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C Carit Uil the X chromosome. At the same 9. In alley cats, the coat color is de

ID: 132248 • Letter: C

Question

C Carit Uil the X chromosome. At the same 9. In alley cats, the coat color is determined Uy a ge tlu U time, the alleles are expressed as co-dominance. Genotypes and cold Females: Xb Xb-orange x"Xb-calico xB xB black Males: ?? x" Y-black orange An orange female cat mates with a black male cat. What is the chan will have an orange kitten? Show your work. a. A calico female cat mates with an orange male cat. What is the predicted genotypic ratio of the kittens? What is the predicted phenotypic ratio? Show your work. b.

Explanation / Answer

9.A Orange female Xb Xb X XB Y Black male

   Gametes           Xb   X XB Y

   kitten            XB Xb   - Calcico
                     Xb Y    - Orange

So, it has 1/2 or 50% chance to get orange kitten.

B.     Calcico female XB Xb X Xb Y Orange male

       Kitten   XB Xb - Calcico
                XB Y - Black male
                Xb Xb - Orange female
                Xb Y - Orange male

Phenotype ratio = 1 Calcico : 2 Orange : 1 Black
Genotype ratio = 1 :1 : 1 :1