Question

For each of the following mechanisms (a-h), consider how it will affect genetic diversity (i.e., diversity of alleles) within a population and select one of the following three options that best describes this effect: (i) increase/maintain, (ii) eliminate, or (iii) no effect [No written explanation necessary]. a. Positive frequency dependent selection b. Negative frequency dependent selection c. Selection in favor of a dominant phenotype d. Selection in favor of a recessive phenotype e. Selection favoring heterozygotes over homozygotes f. Mutation g. Migration from other populations h. Inbreeding

Answer 1

a. In positive frequency-dependent selection, the fitness of a phenotype increases as it becomes more common. -genetic diversity increases

b.In negative frequency-dependent selection, the fitness of a phenotype decreases as it becomes more common. Genetic diversity decreases.

c.Selection in - favour of a dominant phenotype. no effect on the genetic diversity

d. Selection in favour of a recessive phenotype -no effect on the genetic diversity

e. Selection - favouring heterozygotes over homozygotes - increases genetic diversity

f. Mutation-Increases genetic diveristy

g. Migration from other populations -increases genetic diversity

h. Inbreeding- decreases genetic diversity