Change in allele frequencies caused by differences in survival and reproduction

Question

Change in allele frequencies caused by differences in survival and reproduction among individuals possessing different alleles is called _____.

A. gene flow

B. natural selection

C. mutation

D. genetic drift

2._____ is the ultimate source of genetic variation and, therefore, of new alleles.

A. Gene flow

B. Natural selection

C. Mutation

D. Polymerization

3._____ causes changes in the allele frequencies of a population by chance alone.

A. Gene flow

B. Natural selection

C. Meiotic cell division

D. Genetic drift

4.Which of the following terms from the Hardy-Weinberg equations is used to determine the frequency of the homozygous dominant genotype of a population?

A. p2

B. p

C. 2pq

D. q

E. q2

5.____________ is the sum of all the alleles for a trait in a population.

A. Population genetics

B. Hardy-Weinberg fact

C. Microevolution

D. Gene pool

Explanation / Answer

1. Genetic drift.

2. Mutation is the ultimate source of genetic variation.

3. Genetic drift causes changes in the allele frequencies of a population by chance alone

4. p2 is used to determine the frequency of the homozygous dominant genotype of a population in Hardy-Weinberg equations.

5. Gene pool is the sum of all the alleles for a trait in a population.

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