2 more genetics questions?

Question

Coat color in mice exhibits epistasis. The dominant allele A yields an agouti (grayish) coat; whereas, the recessive allele a yields a black coat. A second gene controls production or absence of any pigment. The dominant allele B allows coat color; whereas, the recessive allele b inhibits coat color, and bb is albino. What coat color will a mouse with the following genotype have: aaBb?
A. agouti.
B. black.
C. albino.
D. agouti and black.

What coat color will a mouse with the following genotype have: Aabb?
A. agouti.
B. black.
C. albino.
D. agouti and black.

Answer 1

1. since it has a B allele, it will have color. Since it is aa, it will be black.

2. since it is bb, it will have no pigment, and so will be albino.

Answer 2

In the first case, the second gene is allowing pigmentation, so we see the pigment genes. The pigment genes are aa, both recessive, so therefore the pigment would obviously be black.

In the second case, the second gene does not allow pigmentation at all. So, according to me, the mouse would be albino. Still, I am not so sure of the second reasoning, but pretty sure of the first one!

Tell me how's the answer...after all...I am still 14!