A Man Who Is a Dwarf Due to Achondroplasia and Has

question 38

Multiple Choice

A man who is a dwarf due to achondroplasia and has normal vision marries a color-blind woman of normal height.The man's father was 6 feet tall,and both the woman's parents were of average height.Achondroplasia is autosomal dominant,and red-green color blindness is X-linked recessive.
What proportion of their sons would be color-blind and of normal height?

• A)none
• B)half
• C)one out of four
• D)three out of four

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