Question

In Drosophila , the vestigial wings recessive allele, vg, causes the wings to be very small. A geneticist crossed some true-breeding wild-type males to some vestigial virgin females. The male and female $\mathrm{F}_{1}$ flies were wild type. He then allowed the $F_{1}$ flies to mate with one another and found that $1 / 4$ of the male and female $F_{2}$ flies had vestigial wings. He dumped the vestigial $\mathrm{F}_{2}$ flies into a morgue and allowed the wildtype $\mathrm{F}_{2}$ flies to mate and produce an $\mathrm{F}_{3}$ generation. a. Give the genotype and allele frequencies among the wild-type $\mathrm{F}_{2}$ flies. b. What will be the frequencies of wild-type and vestigial flies in the $\mathrm{F}_{3} ?$ c. Assuming the geneticist repeated the selection against the vestigial $\mathrm{F}_{3}$ flies (that is, he dumped them in a morgue and allowed the wild-type $F_{3}$ flies to mate at random), what will be the frequency of the wild-type and mutant alleles in the $\mathrm{F}_{4}$ generation? d. Now the geneticist lets all of the $\mathrm{F}_{4}$ flies mate at random (that is, both wild-type and vestigial flies mate). What will be the frequencies of wild-type and vestigial $\mathrm{F}_{5}$ flies?

          In Drosophila , the vestigial wings recessive allele, vg, causes the wings to be very small. A geneticist crossed some true-breeding wild-type males to some vestigial virgin females. The male and female $\mathrm{F}_{1}$ flies were wild type. He then allowed the $F_{1}$ flies to mate with one another and found that $1 / 4$ of the male and female $F_{2}$ flies had vestigial wings. He dumped the vestigial $\mathrm{F}_{2}$ flies into a morgue and allowed the wildtype $\mathrm{F}_{2}$ flies to mate and produce an $\mathrm{F}_{3}$ generation.
a. Give the genotype and allele frequencies among the wild-type $\mathrm{F}_{2}$ flies.
b. What will be the frequencies of wild-type and vestigial flies in the $\mathrm{F}_{3} ?$
c. Assuming the geneticist repeated the selection against the vestigial $\mathrm{F}_{3}$ flies (that is, he dumped them in a morgue and allowed the wild-type $F_{3}$ flies to mate at random), what will be the frequency of the wild-type and mutant alleles in the $\mathrm{F}_{4}$ generation?
d. Now the geneticist lets all of the $\mathrm{F}_{4}$ flies mate at random (that is, both wild-type and vestigial flies mate). What will be the frequencies of wild-type and vestigial $\mathrm{F}_{5}$ flies?

Added by Tammy H.

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