Question 1

Which of the following is NOT an assumption of the Hardy-Weinberg equilibrium?

Accepted Answer

Natural selection favors one allele over another.

Question 2

If the frequency of allele $$A in a $$population is $$p = 0.7$$, what is the expected frequency of heterozygotes ($$Aa) $$under Hardy-Weinberg equilibrium?

Accepted Answer

$$0.42$$

Question 3

A population of flowers has two alleles for petal color: $$R ($$red) and $$W ($$white). If $$80\% of $$the alleles in the gene pool are $$R$$, what is the expected frequency of $$RR$$ homozygotes in the next generation?

Accepted Answer

$$0.64$$

Question 4

Which scenario would most likely lead to a change in allele frequencies in a population?

Accepted Answer

A disease that kills individuals with a specific genotype.

Question 5

Why is genetic variation within a population essential for evolution?

Accepted Answer

It enables natural selection to act on different traits.

Question 6

In a population, the frequency of allele $$a is$$ $$q = 0.3. $$What is the expected frequency of $$aa$$ homozygotes under Hardy-Weinberg equilibrium?

Accepted Answer

$$0.09$$

Question 7

Which of the following would violate the Hardy-Weinberg equilibrium and result in evolutionary change?

Accepted Answer

Random sampling error in a small population.

Question 8

A population of beetles has two alleles for shell color: $$B ($$brown) and $$b ($$black). If the population is in Hardy-Weinberg equilibrium and $$36\% of $$the beetles are $$bb$$, what is the frequency of allele $$b$$?

Accepted Answer

$$0.6$$

Question 9

Which of the following best describes a gene pool?

Accepted Answer

The set of all alleles present in a population.

Question 10

If a population is not evolving, what can be said about the allele frequencies from one generation to the next?

Accepted Answer

They will remain constant.

Question 11

Which of the following is a real-world application of the Hardy-Weinberg equation?

Accepted Answer

Estimating the percentage of a population carrying a recessive disease allele.

Question 12

A population of 1000 individuals has two alleles, $$A$$ and $$a. If$$ $$A is $$present at a frequency of $$0.4$$, how many $$A$$ alleles are there in the population?

Accepted Answer

400

Question 13

Which condition is NOT required for Hardy-Weinberg equilibrium?

Accepted Answer

Small population size.

Question 14

If the frequency of allele $$A is$$ $$0.5$$ and allele $$a is$$ $$0.5$$, what is the expected frequency of $$Aa$$ heterozygotes?

Accepted Answer

$$0.50$$

Question 15

Which of the following would most likely cause a population to evolve?

Accepted Answer

Migration of individuals into or out of the population.

Question 16

In a population, the frequency of allele $$A is$$ $$0.8$$ and allele $$a is$$ $$0.2. $$What is the expected frequency of $$AA$$ homozygotes?

Accepted Answer

$$0.64$$

Question 17

Which of the following statements about Hardy-Weinberg equilibrium is TRUE?

Accepted Answer

It requires that no evolutionary forces act on the population.

Question 18

A population of 500 individuals has two alleles, $$G$$ and $$g. If$$ $$g is $$present at a frequency of $$0.3$$, how many $$g$$ alleles are there in the population?

Accepted Answer

150

Question 19

Which of the following is a consequence of genetic drift in small populations?

Accepted Answer

Rare alleles may be lost from the population.

Question 20

If a population violates one of the Hardy-Weinberg assumptions, what is the most likely outcome?

Accepted Answer

Allele frequencies will change over time.

Population Genetics and the Hardy-Weinberg Principle

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