Genes usually have multiple alleles. Alleles that have the same phenotype can be grouped together. Alleles can also be ranked in an allelic series, such as with agouti, which governs coat color in dogs and other animals. Rank the following alleles for the hypothetical gene C, governing hair color, in order of dominance (most dominant first) .
There are four alleles: Cr, Cy, Cb, and Cw. Individuals homozygous for these alleles have red, yellow, black, and brown hair, respectively. Cr_ individuals have red hair. Heterozygotes carrying Cy do not have yellow hair. In a cross between homozygous Cb and Cw individuals, ¾ of the offspring have brown hair.
-Cw
A) 1 (most dominant)
B) 2
C) 3
D) 4 (least dominant)
Correct Answer:
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