Part C - The Effect Of A Third Gene On Fur Color

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Part C - The Effect Of A Third Gene On Fur Color

In the same mouse species, a third unlinked gene (gene C/c) also has an epistatic effect on fur color. The presence of the dominant allele C (for color), allows the A/a and B/b genes to be expressed normally. The presence of two recessive alleles (cc), on the other hand, prevents any pigment from being formed, resulting in an albino (white) mouse.
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Because the C/c gene is epistatic to both the A/a and B/b genes, any offspring with the cc allele combination will be albino. Otherwise, the A/a and B/b genes are expressed normally. AaBbcc-Albino, AaBBCC-Agouti Black Aabbcc-Albono AAbbCc Agouti Brown aaBbCc-Solid color, Black AABBcc-Albino
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