In Cats, an X-Linked Locus Is Responsible for Fur Color

question 50

Multiple Choice

In cats, an X-linked locus is responsible for fur color. There are two known alleles at this locus. One results in black fur color; the other results in orange fur color. A heterozygote animal has patches of orange and black fur (tortoiseshell) . Which of the following explains the patches of color in female heterozygote cats?

• A) Incomplete dominance of the black fur color allele
• B) Fur color is codominant at the organism level
• C) Imprinting at the fur color locus
• D) Random X inactivation affects fur color

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