In cats, the gene for fur color is X-linked and there are 2 alleles, orange and black. The tortoiseshell pattern of black and orange patches is created due to X-inactivation in a heterozygote. A litter of kittens is born with 2 tortoiseshell females and 2 orange males. Of the choices below, which could be the phenotypes of their parents?
a) The mother is orange and the father is tortoiseshell.
b) Both the mother and father are black.
c) The mother is orange and the father is black.
d) The mother is black and the father is orange.
Answer: c) The mother is orange and the father is black.
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a. true b. false
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