PLEASE SHOW ALL WORK! In Drosophila, a type of fruit fly, the long-wing allele (

Question

PLEASE SHOW ALL WORK!

In Drosophila, a type of fruit fly, the long-wing allele (L) is dominant over the vestigial-wing allele (I): If a heterozygous long-winged fly is mated with a homozygous long-winged fly, what percentage of the offspring would be expected to be homozygous long-winged? Would there be any vestigial-winged flies? A long-winged fly mated with a fly having vestigial wings produces 35 long-winged and 33 vestigial-winged offspring. What are the genotypes of the parents and the offspring?

Explanation / Answer

Answer 1. heterozygous long winged fly genotype= Ll

Homozygous long winged fly genotype = LL

mating between these two: LL x Ll

from above punnet square it is clear that % of homozygous long winged offsprings (LL) is= 50%

and there is NO vestigial winged flies

Answer 2. genotypes of parents= Ll(long) x ll(vest.)

genotype of offspring= Ll(long winged), ll(vest.)

Gametes L l L LL Ll L LL Ll

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