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

question 40

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

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