Genetics for a new Generation - An animal science perspective

Epistasis 3: Recessive Epistatic Gene

In cats, a sex-linked locus produces black, orange, or tortoiseshell phenotypes. Also, albinoism is caused by a recessive allele at the C locus. What is the ratio of progeny phenotypes expected from the following matings:

females --> X^TX^T is Black X^TX^t is Tortoiseshell X^tX^t is Orange C- is colored cc is albino

males --> X^TY is Black X^tY is Orange

female

male
female
male

female

male

female

X^TX^TCc x X^tYcc

X^TX^tcc x X^tYCc

X^TX^tCc x X^tYCc

females -->	X^TX^T is Black	X^TX^t is Tortoiseshell	X^tX^t is Orange	C- is colored	cc is albino
males -->	X^TY is Black		X^tY is Orange	C- is colored	cc is albino


	female	male	female	male	female	male	female
X^TX^TCc x X^tYcc
X^TX^tcc x X^tYCc
X^TX^tCc x X^tYCc