Exam 7: The Genetics of Populations

Consider a diploid population in which a single locus has only two alleles,A₁ and A₂,whose respective allele frequencies equal p and q.The summation of p+q would equal

Disassortative mating may be beneficial because

Assume a biallelic locus in a diploid population has the genotype frequencies: A₁A₁ = 0.59; A₁A₂ = 0.16; and A₂A₂ = 0.25.What is the observed allele frequency (p)of the A₁ allele?

Which of the bar graphs in the figure below depicts data regarding a beneficial mutation that will become fixed most rapidly?

Name three predictions generated from the Hardy-Weinberg model.

Which assumption of the Hardy-Weinberg model is being presented in the figure below?

If no evolutionary force acts on a population besides mutation,genotype frequencies will

In the following figure,m is the mutation rate from allele A₁,which produces a functional protein,to A₂,an allele that fails to produce a functional protein.The reverse mutation rate,n,describes the mutation rate from A₂,the nonfunctioning allele,to A₁,the functional protein allele.Why would one expect the value of m to be much higher than the value of n at this locus?

Consider a human illness in which individuals homozygous for a deleterious,recessive allele suffer from a disease with a selection coefficient of s = 0.85 (i.e.,a relative fitness of 0.15).At equilibrium,the nondeleterious allele has a population frequency of 0.95.What is the mutation rate from the healthy allele to the deleterious allele?

The figure below demonstrates that

When a population is in a neutral equilibrium,a small change causes the population to

Two gene copies are identical by descent if

In the figure below,what will be the equilibrium frequency of A₁ on the island?

Hardy and Punnett were two of the founders of which biological field of study?

The figure above depicts the change in p over time when the forward mutation rate is twice the reverse mutation rate.This results in a p equilibrium frequency that approaches 0.333.If the forward mutation rate was four times as fast as the reverse mutation rate,one would expect the equilibrium value of p to be

Consider a locus in which the fitness of AA and Aa genotypes are greater than the fitness of aa genotype.In addition,this locus experiences forward mutation from the A allele to a allele.At this locus,the A allele will

Consider a population of crickets in which the A and a alleles at a single locus control the shape of the male and female reproductive organs.Males that are AA can only mate with females that are aa,and vice versa.Heterozygous individuals can mate with either homozygous group.After many generations of selection,the two alleles will reach a(n)_________ equilibrium due to _________ frequency dependent selection.

Consider a sample of 100 individuals sampled from a population in Hardy-Weinberg equilibrium that are genotyped at a single locus.Of these 100 individuals,25 individuals are A₁A₁ homozygotes,45 are A₁A₂ heterozygotes,and 30 are A₂A₂ homozygotes.List the observed and expected genotypic frequencies of this locus in this sample.

The figure above documents the changing allelic frequency of the sinistral morph of a Lake Tangyanikan cichlid.This figure is an example of

When Takata et al.2002 examined allele and genotype frequencies at the myoglobin locus in a Japanese population,the observed and expected genotypic frequencies were very similar.Had they been very different,what could one conclude about this locus in this population?