Question
3) The female dog is heterozygous. The male dog is homozygous recessive. Figure out the
percentage or ratio of possible phenotypes and genotypes of their puppies by using a Punnett
Square.
Place the alleles for the male parent
below. One allele on each line:
% of possible Genotypes:
FF:
Place the alleles for the
Ff:
female parent on the
side. One allele on
ff:
each line:
% of possible Phenotypes:
Black fur:
Grey fur:
Answer
The Punnett Square would look like this:
| | f | f |
|---|---|---|
| F | Ff| Ff|
| f | ff| ff|
Possible genotypes: 50% Ff, 50% ff
Possible phenotypes: 50% black fur, 50% grey fur