Need a bit of help...?

Question

If two animals heterozygous for a single pair of alleles are mated and have 200 offspring, about how many would be expected to have the phenotype of the dominant allele? (that is, to look like the parents?)

Not to sure how to set this up.

Thanks.

Answer 1

Tt x Tt gives TT Tt Tt tt.

The phenotypic ratio is 3:1.

So 3/4 of 200 =150(answer).