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Draw a Punnet square showing the F1 and F2 generations of a parental cross between a...

Draw a Punnet square showing the F1 and F2 generations of a parental cross between a homozygous cinnabar fly and a homozygous brown fly. Label the different eye phenotypes.

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Answer #1

CONSIDER,

Homozygous cinnabar fly = BB

Homozygous brown fly = bb

between the parental cross f1 generation

B = Domain

b = Recessive

* In f1 generation all the offspring are found to be a heterozugous phenotype ie Bb

And going to the f2 generation , the cross in between the heterozygous trait Bb X Bb

BB =homozygous cinnabar fly

Bb =heterozygous cinnabar fly

bb = homozygous brown fly

finally the ratio between cinnabar fly : brown fly is 3:1 respectively.

  

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