In Humans,blue Eyes Are Inherited as a Recessive Autosomal Trait

question 12

Multiple Choice

In humans,blue eyes are inherited as a recessive autosomal trait and color blindness is an X-linked recessive trait.A woman with blue eyes and normal color vision whose father was color blind marries a man who also has normal color vision.He has brown eyes,but his mother had blue eyes.Which of the following do you expect to be true for their sons?

• A)One-half of their sons will have normal color vision and brown eyes;1/2 of their sons will have normal color vision and blue eyes.
• B)Their sons will all have normal color vision and brown eyes.
• C)One-fourth of their sons will be color blind and have blue eyes,1/4 of their sons will be color blind and have brown eyes,1/4 of their sons will have normal color vision and blue eyes,1/4 of their sons will have normal color vision and brown eyes.
• D)Their sons will all have normal color vision and blue eyes.
• E)One-half of their sons will be color blind and have blue eyes;1/2 their sons will be color blind and have brown eyes.

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