Exam 23: Population Genetics

The A-B-O blood types are determined by three alleles I^A,I^B,and i.In one population the frequency of individuals who are homozygous for type A blood is 0.063,the frequency of individuals who are homozygous for type B blood is 0.015,and the frequency of individuals who are blood type O is 0.44.What is the frequency of individuals are blood type AB?

Which of the following prevent the Hardy-Weinberg principle from applying to a population?

Which type of selection creates a dynamic equilibrium in which different alleles are retained in a population despite their being harmful in homozygotes?

At the level of the gene,natural selection changes the frequencies of

In a population that experiences migration (i.e.the merging of two separate populations),why are observed allelic and genotypic frequencies different than what is predicted by the Hardy-Weinberg equilibrium?

In a sample of 600 individuals (400 men and 200 women)48 men have X-linked color blindness (X^c)and all the others have normal color vision (X^c).What is the frequency of women who are colorblind?

There are 300 individuals in sample group #1 taken from population X.Seventy-five individuals of sample group are homozygous for the trait in question (I^AI^A).Seventy five individuals are homozygous for the trait (I^BI^B).Everyone else is heterozygous (I^AI^B)for the trait.What is the frequency of allele B in the sample group,assuming the trait is controlled by a single gene?

When a population is a single interbreeding unit,it is said to be

Which of the following is a key assumption underlying the Hardy-Weinberg principle? 1)The members of the population mate at random with respect to the gene under study. 2)The members of the population are artificially selected with respect to the gene under study. 3)The members of the population must live on an island.

What is the ultimate source of all genetic variability?

In a sample of 3000 individuals,1000 men and 2000 women,200 men have hemophilia and all the others have normal clotting function.All the women have normal clotting function.What are the frequencies for the hemophilia allele (X^h)and normal allele (X^H)?

The A-B-O blood types are determined by three alleles I^A,I^B,and i.In one population the frequency of individuals who are homozygous for type A blood is 0.063,the frequency of individuals who are homozygous for type B blood is 0.015,and the frequency of individuals who are blood type O is 0.44.What is the frequency of the i allele?

Which of the following occurs when genotypes differ in the ability to survive and reproduce?

Which type of selection can affect the distribution of a quantitative trait?

There are 300 individuals in sample group #1 taken from population X.How many total alleles for the trait in question are present in the sample group,assuming the trait is controlled by a single codominant gene?

Which of the following is most effective at fixing the recessive allele in a population?

In a sample of 400 men,48 have X-linked color blindness and all the others have normal color vision.If men are hemizygous for the allele,what is the frequency for the X-linked color blindness allele?

The frequency of cystic fibrosis found in those of European descent,caused by a homozygous recessive gene is approximately 0.04.Assuming the Hardy-Weinberg equilibrium applies,what are the frequencies of the recessive/affected allele,the dominant/normal allele,the homozygous normal condition,and the carrier/heterozygous genotype?

Which of the following individuals described a mathematical relationship between allele frequencies and genotype frequencies?

In a sample of 600 individuals (400 men and 200 women)48 men have X-linked color blindness (X^c)and all the others have normal color vision (X^c).What is the frequency of women who are carriers?