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

question 19

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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