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

question 8

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 coat color phenotypes are expected from the cross of a black female and an orange male?

• A) tortoiseshell females; tortoiseshell males
• B) black females; orange males
• C) tortoiseshell females; black males
• D) orange females; black males

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Definitions:

Major Organic Product

The primary product of an organic reaction that is formed in the greatest yield compared to any other products.

Major Product

The primary product of a chemical reaction that is formed in the greatest quantity compared to other products.

Phthalic Acid

An aromatic dicarboxylic acid, with formula C6H4(CO2H)2, it is used as a precursor to other chemicals such as dyes, perfumes, and plastics.

Acid Derivative

A compound obtained by replacing one or more of the hydroxyl groups of an acid with an organic group.