A Man Who Is a Dwarf with Achondroplasia and Normal

question 11

Multiple Choice

A man who is a dwarf with achondroplasia and normal vision marries a color-blind woman of normal height. The man's father was six feet tall, and both the woman's parents were of average height. Dwarfism caused by achondroplasia is autosomal dominant, and red-green color blindness is X-linked recessive. How many of their daughters might be expected to be color-blind with achondroplasia?

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

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