In the guinea pig, curly coat dominates over smooth and black over white. What phenotypic cleavage can be expected

In the guinea pig, curly coat dominates over smooth and black over white. What phenotypic cleavage can be expected if hybrids obtained from crossing a homozygous white curly female with a homozygous black smooth male are crossed?

Let the gene that causes the development of curly hair in guinea pigs be B, then the gene for smooth hair will be b.

Let the gene for black wool be C, then the gene for white wool is c.

Curly white pig, by condition, is homozygous. Let’s write it down BBcc. She will produce Bc eggs.

The black smooth male is also homozygous – bbCC. The sperm it produces will be bC.

The offspring of these individuals will look like: ВbСc. Such guinea pigs will produce sex cells BC, bc, bC and BC.

In turn, the offspring of such hybrids will look like this:

Cubs with black curly hair (2ВbСС, ВВСС, 2ВВСс, 4ВbСc);

guinea pigs with smooth black hair (2bbСc, bbСС);

guinea pigs with white smooth fur (bbcc);

guinea pigs with white curly hair (2Bbcc, BBcc).

Answer: 9: 3: 3: 1.