Genetics Question?

Question

Hey everyone, I have a genetics problem that I've been working on for a couple hours and have been coming up with nothing. So here's the question:

Fat mice can be produced by 2 independently assorting genes. The recessive genotype ob/ob produces a fat sterile mouse called "obese." Its dominant allele Ob produces normal growth. The recessive genotype ad/ad also produces a fat, sterile mouse called "adipose" and its dominant allele Ad produces normal growth. What phenotypic proportions of fat versus normal would be expected among the F1 and F2 from parents of genotype Ob/ob, Ad/ad?

Answer 1

When you cross a AAoo to an aaOO mouse you get 16 normal F1 offspring -- AaOo. For the F2 you have to do a 16 square punnett square. Along side and across top the possible gametes are
AO Ao aO ao.
Then match up the gametes to find outcomes.
All top row and far left are normal growth because gets at least one dominant allele for each gene,
Second and third rows have two obese mice each
ooAA ooAa in second row, aaOO and aaOo in third row.
In the forth row there are three obese mice
Ooaa ooAa ooaa. So a total of 7 of 16 obese mice.

Answer 2

ob/Ad and Ob/Ad