In cats the gene for calico multicolored cats is codominant

In cats, the gene for calico (multicolored) cats is codominant. Females that receive a B and an R gene have black and oRange splotches on white coats = calico. Males can only be black or orange, but never calico. Female genotypes must include XX and males XY. a. Show the cross of a female calico cat with a black male____________________________(0.5 pts) What percentage of the kittens will be black and male? _________ (0.5 pts) What percentage of the kittens will be calico and male? _________ (0.5 pts) What percentage of the kittens will be calico and female? _________ (0.5 pts) b. Show the cross of a female black cat, with a male orange cat. ________________________(0.5pts) What percentage of the kittens will be calico and female? ________________________ (0.5pts) What color will all the male cats be? _______________ (0.5 pts)

Solution

Here’s what a calico female’s genotype would look like: X B X R

a. Show the cross of a female calico cat with a black male

XBXR x XBY

XBXB, XBY, XRXB, XRY

What percentage of the kittens will be black and male? __1/4____

What percentage of the kittens will be calico and male? _0_____

What percentage of the kittens will be calico and female? _1/4_____

10. Show the cross of a female black cat, with a male orange cat.

XBXB x XRY

XBXR, XBY, XBXR, XBY

What percentage of the kittens will be calico and female? _2/4 (all females)___

What color will all the male cats be? _black_