In cats, the gene for calico (multicolored) cats is codominant. Females that rec
ID: 320057 • Letter: I
Question
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)
Explanation / Answer
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_
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