a common recessive trait in dogs is deafness. homozygous line of normal-hearing dogs was crossed with a homozygous line of deaf dogs. F1 and F2 generations were produced. What % of F1 generation is expected to have normal hearing? What is a phenoeyeic ratio of the F2 generation?

Question

a common recessive trait in dogs is deafness.  homozygous line of normal-hearing dogs was crossed with a homozygous line of deaf dogs.  F1 and F2 generations were produced.  What % of F1 generation is expected to have normal hearing?  What is a phenoeyeic ratio of the F2 generation?

Ally · Accepted Answer

You’re answer is wrong because if they’re both homozygous parents, one dominant and one recessive, their genotypes would be DD x dd

Devron · Answer

Let: D=normal and d=recessive P1: DD x Dd F1: 1DD : 2Dd : 1dd 66% should have normal hearing. The second question is incomplete.

Devron · Answer

I should have said 75%, but the second question still can not be answered.

nolan · Answer

What is the answer

Raquel · Answer

For his 2nd Experiment, Gregor Mendel self-fertilized plants from the First generation to produce the second generation. However, dogs can’t self-fertilize. So you should use two offspring from the first generation to produce the second generation.