You place 4 fruit flies into each of the 100 vials: one black-bodied male fruit

Question

You place 4 fruit flies into each of the 100 vials: one black-bodied male fruit fly (bb) 2 homozygous wild-type females (BB) and one homozygouse wild-type male (BB). You allow the flies in each vial to mate randomly for 100 generations, keeping the population size in each vial to 10 flies each generation. The b allele has no effect on fitness. Draw the most likely distribution of allele frequencies across all 100 vials after 100 generations.

Can someone please hsow me how to get this answer! I have tried so many times and do not understand how to come up with that distribution.

Explanation / Answer

Since there are 4 fruitflies in th vial having three different genotypes, so the most possible occurance of the genotypes in next generations in each vials are as follows:-
   BB, Bb, Bb and bb.

We know that the b allele has no effect on fitness. It means b allele may show as the homozygous for the allele b at a perticular locus in the gene.
   So, if in the same gene, b allele may behave like as the homozygous at a perticular locus and produce only bb genotype in the next genreation.
Now as we can see the distribution of the frequency of the b allele, there are 70 vials that does not have frequency about the b allele and there are 30 vials that have complete one frequency about the b allele.

So, now it is easy to demonstrate such unique distribution of frequency of b allele.

The vials where b allele behaves like a homozygous at a perticular locus, that vial have a frequency one for the b alletle, while the vials in which the B allele have dominance, they have zero frequency about the b allele.

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