Question 1

The mutation known as trisomy 21, in which an extra copy of chromosome 21 is present, is more commonly known as:

Accepted Answer

A)   Turner syndrome.
B)   Down syndrome.
C)   Klinefelter's syndrome.
D)   Williams syndrome.E) A) and D)
F) C) and D)

Question 2

What effect does natural selection have on population variation?

Accepted Answer

A)   It increases variation.
B)   It decreases variation.
C)   It both increases and decreases variation.
D)   It does not affect variation.E) A) and B)
F) B) and C)

Question 3

Evolution can best be defined as:

Accepted Answer

A)   the appearance of a new species.
B)   a change in allele frequencies in a breeding population over time.
C)   changes in the DNA of an individual over his or her lifetime.
D)   a process that occurs only over extremely long periods of time.E) None of the above
F) A) and B)

Question 4

Malaria is caused by:

Accepted Answer

A)   bites from infected mosquitoes.
B)   a genetic mutation.
C)   drinking bad water.
D)   eating spoiled food.E) None of the above
F) A) and B)

Exam 4: Genes and Their Evolution: Population Genetics

Malaria is caused by:

Correct Answer
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The mutation known as trisomy 21, in which an extra copy of chromosome 21 is present, is more commonly known as:

Correct Answer
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Evolution can best be defined as:

Correct Answer
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What effect does natural selection have on population variation?

Correct Answer
verified

Exam 4: Genes and Their Evolution: Population Genetics

Malaria is caused by:

Correct AnswerverifiedShow Answer

The mutation known as trisomy 21, in which an extra copy of chromosome 21 is present, is more commonly known as:

Correct AnswerverifiedShow Answer

Evolution can best be defined as:

Correct AnswerverifiedShow Answer

What effect does natural selection have on population variation?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified