Mark the letter A, B, C, or D on your answer sheet to indicate the one that best completes each sentence.In bacteria and other organisms,________. A. it is the DNA that provides the genetic informatio...

Read the following passage and mark the letter A,B,C or D on your answer sheet to indicate the correct answer to each of the questions from 55 to 64

Genetics is the study of hereditary characteristics that are passed down from one generation of living organisms to another. Although farmers have used selective breeding to improve the resilience of crops and animals, it wasn't until the mid 1800s that Gregor Mendel started the science of genetics as we know it today. Following Mendel's methods, scientists have discovered "chromosomes" and "DNA". With the ability to study DNA, scientists were ableto study the genetic differences between races.

Modern genetics discovered that all humans are descendants of "Mitochondrial Eve," a woman who lived over 150,000 years ago in Africa. Since the first humans were born, over 75,000 generations have passed, and many subtle differences are now evident. Humans share at least 99% of their genetic makeup. A 1% difference may not seem like much, but when you consider that a chimpanzee shares 98% of human genes, you realize how much a 1% difference makes!

Africans are more closely related to Europeans than any other two groups, despite the fact that they differ so much in appearance. The biggest genetic differences are found between Africans and the native populations of NorthAmerica (22%). However, it is essential to note that the genetic differences between people of the same race are much greater than the differences between people of different races. This means that the argument which claims that genetic differences make one race superior to another is nothing but a tall story.

The differences in various populations may also be the result of circumstances rather than genetic makeup. Factors such as climate, diet, health care, education, and employment as well as other socioeconomic factors are all influential. However, there are some traits which are genetic; for example, there is a much higher incidence of sickle-cell anemia among black populations than any other population group. Adult African-Americans and Latinos have twice as many cases of diabetes than Caucasians. In the U.S., Latinos suffer more deaths from liver disease than other races. Europeans suffer more from heart disease and cancer.

Genes not only affect our susceptibility to disease, they also affect our physical attributes. The Dinka people from the Sudan are considered to be the tallest people with men having an average height of 6ft 3in., while women hit the big time with an impressive 5ft 3in. This contrasts sharply with the Pygmy tribes who get the short end of the stick at only about 4ft 11in.tall. Genetic differences may help us to tailor health services to people of different races or to detect life threatening diseases early. However, they are not significant enough to support the claim that one race is superior toanother. In fact, our modern scientific understanding of human genetic diversity flies in the face of almost all our social stereotypes

Where do the greatest genetic differences occur?

A.Between people of different races.

B. Between Europeans and Africans

C. Between people the same race

D. Between Africans and Asians .

1

DH

Dương Hoàn Anh

16 tháng 2 2019

Đáp án là C

Câu 3 đoạn 3 “it is essential to note that the genetic differences between people of the same race are much greater than the differences between people of different races” sự khác biệt di truyền giữa những người cùng chủng tộc lớn hơn giữa những chủng tộc khác nhau.

Read the following passage and mark the letter A,B,C or D on your answer sheet to indicate the correct answer to each of the questions from 55 to 64Genetics is the study of hereditary characteristics that are passed down from one generation of living organisms to another. Although farmers have used selective breeding to improve the resilience of crops and animals, it wasn't until the mid 1800s that Gregor Mendel started the science of genetics as we know it today. Following Mendel's methods,...

LQ

Lê Quỳnh Anh

17 tháng 7 2019

Read the following passage and mark the letter A,B,C or D on your answer sheet to indicate the correct answer to each of the questions from 55 to 64

Genetics is the study of hereditary characteristics that are passed down from one generation of living organisms to another. Although farmers have used selective breeding to improve the resilience of crops and animals, it wasn't until the mid 1800s that Gregor Mendel started the science of genetics as we know it today. Following Mendel's methods, scientists have discovered "chromosomes" and "DNA". With the ability to study DNA, scientists were ableto study the genetic differences between races.

Modern genetics discovered that all humans are descendants of "Mitochondrial Eve," a woman who lived over 150,000 years ago in Africa. Since the first humans were born, over 75,000 generations have passed, and many subtle differences are now evident. Humans share at least 99% of their genetic makeup. A 1% difference may not seem like much, but when you consider that a chimpanzee shares 98% of human genes, you realize how much a 1% difference makes!

Africans are more closely related to Europeans than any other two groups, despite the fact that they differ so much in appearance. The biggest genetic differences are found between Africans and the native populations of NorthAmerica (22%). However, it is essential to note that the genetic differences between people of the same race are much greater than the differences between people of different races. This means that the argument which claims that genetic differences make one race superior to another is nothing but a tall story.

The differences in various populations may also be the result of circumstances rather than genetic makeup. Factors such as climate, diet, health care, education, and employment as well as other socioeconomic factors are all influential. However, there are some traits which are genetic; for example, there is a much higher incidence of sickle-cell anemia among black populations than any other population group. Adult African-Americans and Latinos have twice as many cases of diabetes than Caucasians. In the U.S., Latinos suffer more deaths from liver disease than other races. Europeans suffer more from heart disease and cancer.

Genes not only affect our susceptibility to disease, they also affect our physical attributes. The Dinka people from the Sudan are considered to be the tallest people with men having an average height of 6ft 3in., while women hit the big time with an impressive 5ft 3in. This contrasts sharply with the Pygmy tribes who get the short end of the stick at only about 4ft 11in.tall. Genetic differences may help us to tailor health services to people of different races or to detect life threatening diseases early. However, they are not significant enough to support the claim that one race is superior toanother. In fact, our modern scientific understanding of human genetic diversity flies in the face of almost all our social stereotypes

What is the author saying in the last paragraph?

A. Races differ a lot in their genetic makeup

B. Genetics differences aren’t significant between races

C. All races are descendants of the same woman

D. Genetic makeup affects people’s physical attributes

1

DH

Dương Hoàn Anh

17 tháng 7 2019

Đáp án là B

fly in the face of something= trái ngược với cái gì. Dịch 2 câu cuối cùng: tuy nhiên, khác biệt di truyền không đủ quan trọng để cho rằng chủng tộc này tốt hơn chủng tộc khác. Trên thực tế, những hiểu biết khoa học hiện đại về sự đa dạng di truyền trái ngược với định kiến xã hội của hầu hết chúng ta. ->B

Read the following passage and mark the letter A,B,C or D on your answer sheet to indicate the correct answer to each of the questions from 55 to 64Genetics is the study of hereditary characteristics that are passed down from one generation of living organisms to another. Although farmers have used selective breeding to improve the resilience of crops and animals, it wasn't until the mid 1800s that Gregor Mendel started the science of genetics as we know it today. Following Mendel's methods,...

LQ

Lê Quỳnh Anh

16 tháng 5 2018

Read the following passage and mark the letter A,B,C or D on your answer sheet to indicate the correct answer to each of the questions from 55 to 64

Genetics is the study of hereditary characteristics that are passed down from one generation of living organisms to another. Although farmers have used selective breeding to improve the resilience of crops and animals, it wasn't until the mid 1800s that Gregor Mendel started the science of genetics as we know it today. Following Mendel's methods, scientists have discovered "chromosomes" and "DNA". With the ability to study DNA, scientists were ableto study the genetic differences between races.

Modern genetics discovered that all humans are descendants of "Mitochondrial Eve," a woman who lived over 150,000 years ago in Africa. Since the first humans were born, over 75,000 generations have passed, and many subtle differences are now evident. Humans share at least 99% of their genetic makeup. A 1% difference may not seem like much, but when you consider that a chimpanzee shares 98% of human genes, you realize how much a 1% difference makes!

Africans are more closely related to Europeans than any other two groups, despite the fact that they differ so much in appearance. The biggest genetic differences are found between Africans and the native populations of NorthAmerica (22%). However, it is essential to note that the genetic differences between people of the same race are much greater than the differences between people of different races. This means that the argument which claims that genetic differences make one race superior to another is nothing but a tall story.

The differences in various populations may also be the result of circumstances rather than genetic makeup. Factors such as climate, diet, health care, education, and employment as well as other socioeconomic factors are all influential. However, there are some traits which are genetic; for example, there is a much higher incidence of sickle-cell anemia among black populations than any other population group. Adult African-Americans and Latinos have twice as many cases of diabetes than Caucasians. In the U.S., Latinos suffer more deaths from liver disease than other races. Europeans suffer more from heart disease and cancer.

Genes not only affect our susceptibility to disease, they also affect our physical attributes. The Dinka people from the Sudan are considered to be the tallest people with men having an average height of 6ft 3in., while women hit the big time with an impressive 5ft 3in. This contrasts sharply with the Pygmy tribes who get the short end of the stick at only about 4ft 11in.tall. Genetic differences may help us to tailor health services to people of different races or to detect life threatening diseases early. However, they are not significant enough to support the claim that one race is superior toanother. In fact, our modern scientific understanding of human genetic diversity flies in the face of almost all our social stereotypes

Which diseases are Africans – Americans more likely to get?

A. Diabetes and liver diseases

B. Sickle-cell anemia and diabetes

C. cancers and sickle-cell anemia

D. Cancer and heart disease

1

DH

Dương Hoàn Anh

16 tháng 5 2018

Đáp án là B

Dòng 3, 4 đoạn 3 “a much higher incidence of sickle-cell anemia among black populations” và “Adult African-Americans and Latinos have twice as many cases of diabetes than Caucasians”=> sickle-cell anemia and diabetes: bệnh hồng cầu hình liềm và bệnh tiểu đường

Read the following passage and mark the letter A,B,C or D on your answer sheet to indicate the correct answer to each of the questions from 55 to 64Genetics is the study of hereditary characteristics that are passed down from one generation of living organisms to another. Although farmers have used selective breeding to improve the resilience of crops and animals, it wasn't until the mid 1800s that Gregor Mendel started the science of genetics as we know it today. Following Mendel's methods,...

LQ

Lê Quỳnh Anh

3 tháng 2 2019

Read the following passage and mark the letter A,B,C or D on your answer sheet to indicate the correct answer to each of the questions from 55 to 64

Genetics is the study of hereditary characteristics that are passed down from one generation of living organisms to another. Although farmers have used selective breeding to improve the resilience of crops and animals, it wasn't until the mid 1800s that Gregor Mendel started the science of genetics as we know it today. Following Mendel's methods, scientists have discovered "chromosomes" and "DNA". With the ability to study DNA, scientists were ableto study the genetic differences between races.

Modern genetics discovered that all humans are descendants of "Mitochondrial Eve," a woman who lived over 150,000 years ago in Africa. Since the first humans were born, over 75,000 generations have passed, and many subtle differences are now evident. Humans share at least 99% of their genetic makeup. A 1% difference may not seem like much, but when you consider that a chimpanzee shares 98% of human genes, you realize how much a 1% difference makes!

Africans are more closely related to Europeans than any other two groups, despite the fact that they differ so much in appearance. The biggest genetic differences are found between Africans and the native populations of NorthAmerica (22%). However, it is essential to note that the genetic differences between people of the same race are much greater than the differences between people of different races. This means that the argument which claims that genetic differences make one race superior to another is nothing but a tall story.

The differences in various populations may also be the result of circumstances rather than genetic makeup. Factors such as climate, diet, health care, education, and employment as well as other socioeconomic factors are all influential. However, there are some traits which are genetic; for example, there is a much higher incidence of sickle-cell anemia among black populations than any other population group. Adult African-Americans and Latinos have twice as many cases of diabetes than Caucasians. In the U.S., Latinos suffer more deaths from liver disease than other races. Europeans suffer more from heart disease and cancer.

Genes not only affect our susceptibility to disease, they also affect our physical attributes. The Dinka people from the Sudan are considered to be the tallest people with men having an average height of 6ft 3in., while women hit the big time with an impressive 5ft 3in. This contrasts sharply with the Pygmy tribes who get the short end of the stick at only about 4ft 11in.tall. Genetic differences may help us to tailor health services to people of different races or to detect life threatening diseases early. However, they are not significant enough to support the claim that one race is superior toanother. In fact, our modern scientific understanding of human genetic diversity flies in the face of almost all our social stereotypes

What does the writer mean with the idiom “ hit the big time”?

A. take pride

B. be famous

C. be successful

D. strike luck

1

DH

Dương Hoàn Anh

3 tháng 2 2019

Đáp án là A

Hit the big time= trở lên thành công và nổi tiếng. take pride= trở lên quan trọng. strick luck= may mắn bất ngờ.

Read the following passage and mark the letter A,B,C or D on your answer sheet to indicate the correct answer to each of the questions from 55 to 64Genetics is the study of hereditary characteristics that are passed down from one generation of living organisms to another. Although farmers have used selective breeding to improve the resilience of crops and animals, it wasn't until the mid 1800s that Gregor Mendel started the science of genetics as we know it today. Following Mendel's methods,...

LQ

Lê Quỳnh Anh

28 tháng 2 2019

Read the following passage and mark the letter A,B,C or D on your answer sheet to indicate the correct answer to each of the questions from 55 to 64

Genetics is the study of hereditary characteristics that are passed down from one generation of living organisms to another. Although farmers have used selective breeding to improve the resilience of crops and animals, it wasn't until the mid 1800s that Gregor Mendel started the science of genetics as we know it today. Following Mendel's methods, scientists have discovered "chromosomes" and "DNA". With the ability to study DNA, scientists were ableto study the genetic differences between races.

Modern genetics discovered that all humans are descendants of "Mitochondrial Eve," a woman who lived over 150,000 years ago in Africa. Since the first humans were born, over 75,000 generations have passed, and many subtle differences are now evident. Humans share at least 99% of their genetic makeup. A 1% difference may not seem like much, but when you consider that a chimpanzee shares 98% of human genes, you realize how much a 1% difference makes!

Africans are more closely related to Europeans than any other two groups, despite the fact that they differ so much in appearance. The biggest genetic differences are found between Africans and the native populations of NorthAmerica (22%). However, it is essential to note that the genetic differences between people of the same race are much greater than the differences between people of different races. This means that the argument which claims that genetic differences make one race superior to another is nothing but a tall story.

The differences in various populations may also be the result of circumstances rather than genetic makeup. Factors such as climate, diet, health care, education, and employment as well as other socioeconomic factors are all influential. However, there are some traits which are genetic; for example, there is a much higher incidence of sickle-cell anemia among black populations than any other population group. Adult African-Americans and Latinos have twice as many cases of diabetes than Caucasians. In the U.S., Latinos suffer more deaths from liver disease than other races. Europeans suffer more from heart disease and cancer.

Genes not only affect our susceptibility to disease, they also affect our physical attributes. The Dinka people from the Sudan are considered to be the tallest people with men having an average height of 6ft 3in., while women hit the big time with an impressive 5ft 3in. This contrasts sharply with the Pygmy tribes who get the short end of the stick at only about 4ft 11in.tall. Genetic differences may help us to tailor health services to people of different races or to detect life threatening diseases early. However, they are not significant enough to support the claim that one race is superior toanother. In fact, our modern scientific understanding of human genetic diversity flies in the face of almost all our social stereotypes

What is genetics?

A. The study of old people

B. The study of muscles in your body

C. The study of inherited characteristics

D. A kind of exercise

1

DH

Dương Hoàn Anh

28 tháng 2 2019

Đáp án là C

Hereditary= di truyền, inherited= thừa hưởng. Câu 1 đoạn 1 “Genetics is the study of hereditary characteristics” Di truyền học là nghiên cứu các đặc điểm di truyền

Read the following passage and mark the letter A,B,C or D on your answer sheet to indicate the correct answer to each of the questions from 55 to 64Genetics is the study of hereditary characteristics that are passed down from one generation of living organisms to another. Although farmers have used selective breeding to improve the resilience of crops and animals, it wasn't until the mid 1800s that Gregor Mendel started the science of genetics as we know it today. Following Mendel's methods,...

LQ

Lê Quỳnh Anh

1 tháng 8 2017

Read the following passage and mark the letter A,B,C or D on your answer sheet to indicate the correct answer to each of the questions from 55 to 64

Genetics is the study of hereditary characteristics that are passed down from one generation of living organisms to another. Although farmers have used selective breeding to improve the resilience of crops and animals, it wasn't until the mid 1800s that Gregor Mendel started the science of genetics as we know it today. Following Mendel's methods, scientists have discovered "chromosomes" and "DNA". With the ability to study DNA, scientists were ableto study the genetic differences between races.

Modern genetics discovered that all humans are descendants of "Mitochondrial Eve," a woman who lived over 150,000 years ago in Africa. Since the first humans were born, over 75,000 generations have passed, and many subtle differences are now evident. Humans share at least 99% of their genetic makeup. A 1% difference may not seem like much, but when you consider that a chimpanzee shares 98% of human genes, you realize how much a 1% difference makes!

Africans are more closely related to Europeans than any other two groups, despite the fact that they differ so much in appearance. The biggest genetic differences are found between Africans and the native populations of NorthAmerica (22%). However, it is essential to note that the genetic differences between people of the same race are much greater than the differences between people of different races. This means that the argument which claims that genetic differences make one race superior to another is nothing but a tall story.

The differences in various populations may also be the result of circumstances rather than genetic makeup. Factors such as climate, diet, health care, education, and employment as well as other socioeconomic factors are all influential. However, there are some traits which are genetic; for example, there is a much higher incidence of sickle-cell anemia among black populations than any other population group. Adult African-Americans and Latinos have twice as many cases of diabetes than Caucasians. In the U.S., Latinos suffer more deaths from liver disease than other races. Europeans suffer more from heart disease and cancer.

Genes not only affect our susceptibility to disease, they also affect our physical attributes. The Dinka people from the Sudan are considered to be the tallest people with men having an average height of 6ft 3in., while women hit the big time with an impressive 5ft 3in. This contrasts sharply with the Pygmy tribes who get the short end of the stick at only about 4ft 11in.tall. Genetic differences may help us to tailor health services to people of different races or to detect life threatening diseases early. However, they are not significant enough to support the claim that one race is superior toanother. In fact, our modern scientific understanding of human genetic diversity flies in the face of almost all our social stereotypes

What does the phrase “ a tall story” mean?

A. exaggeration

B. something difficult to believe

C. something cynical

D. something untrue

1

DH

Dương Hoàn Anh

1 tháng 8 2017

Đáp án là B

A tall story= chuyện khó tin. Câu cuối đoạn 3 “This means that the argument which claims that genetic differences make one race superior to another is nothing but a tall story.” Điều này có nghĩa là những tranh luận tuyên bố rằng đa dạng di truyền làm chủng tộc này giỏi hơn chủng tộc khác chẳng có nghĩa lý

gì nhưng lại khó mà tin được.

Read the following passage and mark the letter A,B,C or D on your answer sheet to indicate the correct answer to each of the questions from 55 to 64Genetics is the study of hereditary characteristics that are passed down from one generation of living organisms to another. Although farmers have used selective breeding to improve the resilience of crops and animals, it wasn't until the mid 1800s that Gregor Mendel started the science of genetics as we know it today. Following Mendel's methods,...

LQ

Lê Quỳnh Anh

9 tháng 11 2018

Read the following passage and mark the letter A,B,C or D on your answer sheet to indicate the correct answer to each of the questions from 55 to 64

Genetics is the study of hereditary characteristics that are passed down from one generation of living organisms to another. Although farmers have used selective breeding to improve the resilience of crops and animals, it wasn't until the mid 1800s that Gregor Mendel started the science of genetics as we know it today. Following Mendel's methods, scientists have discovered "chromosomes" and "DNA". With the ability to study DNA, scientists were ableto study the genetic differences between races.

Modern genetics discovered that all humans are descendants of "Mitochondrial Eve," a woman who lived over 150,000 years ago in Africa. Since the first humans were born, over 75,000 generations have passed, and many subtle differences are now evident. Humans share at least 99% of their genetic makeup. A 1% difference may not seem like much, but when you consider that a chimpanzee shares 98% of human genes, you realize how much a 1% difference makes!

Africans are more closely related to Europeans than any other two groups, despite the fact that they differ so much in appearance. The biggest genetic differences are found between Africans and the native populations of NorthAmerica (22%). However, it is essential to note that the genetic differences between people of the same race are much greater than the differences between people of different races. This means that the argument which claims that genetic differences make one race superior to another is nothing but a tall story.

The differences in various populations may also be the result of circumstances rather than genetic makeup. Factors such as climate, diet, health care, education, and employment as well as other socioeconomic factors are all influential. However, there are some traits which are genetic; for example, there is a much higher incidence of sickle-cell anemia among black populations than any other population group. Adult African-Americans and Latinos have twice as many cases of diabetes than Caucasians. In the U.S., Latinos suffer more deaths from liver disease than other races. Europeans suffer more from heart disease and cancer.

Genes not only affect our susceptibility to disease, they also affect our physical attributes. The Dinka people from the Sudan are considered to be the tallest people with men having an average height of 6ft 3in., while women hit the big time with an impressive 5ft 3in. This contrasts sharply with the Pygmy tribes who get the short end of the stick at only about 4ft 11in.tall. Genetic differences may help us to tailor health services to people of different races or to detect life threatening diseases early. However, they are not significant enough to support the claim that one race is superior toanother. In fact, our modern scientific understanding of human genetic diversity flies in the face of almost all our social stereotypes

What does the word “ they” in paragraph 3 refer to?

A. Africans

B.Europeans

C. groups

D. Africans and European

1

DH

Dương Hoàn Anh

9 tháng 11 2018

Đáp án là D

Câu 1 đoạn 3 “Africans are more closely related to Europeans than any other two groups, despite the fact that they differ so much in appearance” người châu Phi liên quan gần gũi đến người châu Âu hơn bất cứ nhóm nào khác, mặc dù họ khác nhau rất nhiều về ngoại hình-> they là người châu Phi và châu Âu.

Read the following passage and mark the letter A,B,C or D on your answer sheet to indicate the correct answer to each of the questions from 55 to 64Genetics is the study of hereditary characteristics that are passed down from one generation of living organisms to another. Although farmers have used selective breeding to improve the resilience of crops and animals, it wasn't until the mid 1800s that Gregor Mendel started the science of genetics as we know it today. Following Mendel's methods,...

LQ

Lê Quỳnh Anh

15 tháng 1 2017

Read the following passage and mark the letter A,B,C or D on your answer sheet to indicate the correct answer to each of the questions from 55 to 64

Genetics is the study of hereditary characteristics that are passed down from one generation of living organisms to another. Although farmers have used selective breeding to improve the resilience of crops and animals, it wasn't until the mid 1800s that Gregor Mendel started the science of genetics as we know it today. Following Mendel's methods, scientists have discovered "chromosomes" and "DNA". With the ability to study DNA, scientists were ableto study the genetic differences between races.

Modern genetics discovered that all humans are descendants of "Mitochondrial Eve," a woman who lived over 150,000 years ago in Africa. Since the first humans were born, over 75,000 generations have passed, and many subtle differences are now evident. Humans share at least 99% of their genetic makeup. A 1% difference may not seem like much, but when you consider that a chimpanzee shares 98% of human genes, you realize how much a 1% difference makes!

Africans are more closely related to Europeans than any other two groups, despite the fact that they differ so much in appearance. The biggest genetic differences are found between Africans and the native populations of NorthAmerica (22%). However, it is essential to note that the genetic differences between people of the same race are much greater than the differences between people of different races. This means that the argument which claims that genetic differences make one race superior to another is nothing but a tall story.

The differences in various populations may also be the result of circumstances rather than genetic makeup. Factors such as climate, diet, health care, education, and employment as well as other socioeconomic factors are all influential. However, there are some traits which are genetic; for example, there is a much higher incidence of sickle-cell anemia among black populations than any other population group. Adult African-Americans and Latinos have twice as many cases of diabetes than Caucasians. In the U.S., Latinos suffer more deaths from liver disease than other races. Europeans suffer more from heart disease and cancer.

Genes not only affect our susceptibility to disease, they also affect our physical attributes. The Dinka people from the Sudan are considered to be the tallest people with men having an average height of 6ft 3in., while women hit the big time with an impressive 5ft 3in. This contrasts sharply with the Pygmy tribes who get the short end of the stick at only about 4ft 11in.tall. Genetic differences may help us to tailor health services to people of different races or to detect life threatening diseases early. However, they are not significant enough to support the claim that one race is superior toanother. In fact, our modern scientific understanding of human genetic diversity flies in the face of almost all our social stereotypes

What two factors contribute to the differences between races?

A. Genetics and socioeconomic factors

B. Genetics and access to health care

C. Access to health care and socioeconomic factors

D. Genetic makeup and circumstances

1

DH

Dương Hoàn Anh

15 tháng 1 2017

Đáp án là D

Câu 2,3 đoạn 4 “Factors such as climate, diet, health care, education, and employment as well as other socioeconomic factors are all influential. However, there are some traits which are genetic” các nhân tố khí hậu, chế độ ăn uống, chăm sóc sức khỏe,… cũng như nhân tố kinh tế xã hội đều ảnh hưởng. Tuy nhiên, có vài đặc điểm là do di truyền.

Read the following passage and mark the letter A,B,C or D on your answer sheet to indicate the correct answer to each of the questions from 55 to 64Genetics is the study of hereditary characteristics that are passed down from one generation of living organisms to another. Although farmers have used selective breeding to improve the resilience of crops and animals, it wasn't until the mid 1800s that Gregor Mendel started the science of genetics as we know it today. Following Mendel's methods,...

LQ

Lê Quỳnh Anh

12 tháng 2 2017

Read the following passage and mark the letter A,B,C or D on your answer sheet to indicate the correct answer to each of the questions from 55 to 64

Genetics is the study of hereditary characteristics that are passed down from one generation of living organisms to another. Although farmers have used selective breeding to improve the resilience of crops and animals, it wasn't until the mid 1800s that Gregor Mendel started the science of genetics as we know it today. Following Mendel's methods, scientists have discovered "chromosomes" and "DNA". With the ability to study DNA, scientists were ableto study the genetic differences between races.

Modern genetics discovered that all humans are descendants of "Mitochondrial Eve," a woman who lived over 150,000 years ago in Africa. Since the first humans were born, over 75,000 generations have passed, and many subtle differences are now evident. Humans share at least 99% of their genetic makeup. A 1% difference may not seem like much, but when you consider that a chimpanzee shares 98% of human genes, you realize how much a 1% difference makes!

Africans are more closely related to Europeans than any other two groups, despite the fact that they differ so much in appearance. The biggest genetic differences are found between Africans and the native populations of NorthAmerica (22%). However, it is essential to note that the genetic differences between people of the same race are much greater than the differences between people of different races. This means that the argument which claims that genetic differences make one race superior to another is nothing but a tall story.

The differences in various populations may also be the result of circumstances rather than genetic makeup. Factors such as climate, diet, health care, education, and employment as well as other socioeconomic factors are all influential. However, there are some traits which are genetic; for example, there is a much higher incidence of sickle-cell anemia among black populations than any other population group. Adult African-Americans and Latinos have twice as many cases of diabetes than Caucasians. In the U.S., Latinos suffer more deaths from liver disease than other races. Europeans suffer more from heart disease and cancer.

Genes not only affect our susceptibility to disease, they also affect our physical attributes. The Dinka people from the Sudan are considered to be the tallest people with men having an average height of 6ft 3in., while women hit the big time with an impressive 5ft 3in. This contrasts sharply with the Pygmy tribes who get the short end of the stick at only about 4ft 11in.tall. Genetic differences may help us to tailor health services to people of different races or to detect life threatening diseases early. However, they are not significant enough to support the claim that one race is superior toanother. In fact, our modern scientific understanding of human genetic diversity flies in the face of almost all our social stereotypes

What were scientists able to discover using Mendel’s methods?

A. Chromosomes.

B. DNA

C. Genetic difference

D. Chromosomes and DNA

1

DH

Dương Hoàn Anh

12 tháng 2 2017

Đáp án là D

Câu 3 đoạn 1 “Following Mendel's methods, scientists have discovered "chromosomes" and "DNA".” Theo phương pháp của Men- đen, các nhà khoa học khám phá ra nhiễm sắc thể và DNA.