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Red-Green Color Blindness Is a Sex-Linked Recessive Trait in Humans

Question 21

Multiple Choice

Red-green color blindness is a sex-linked recessive trait in humans. Two people with normal color vision have a color-blind son. What are the genotypes of the parents?


A) XnXn and XnY
B) XnXn and XNY
C) XNXN and XnY
D) XNXN and XNY
E) XNXn and XNY

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