A man who is an achondroplastic dwarf with 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. Achondroplastic dwarfism is autosomal dominant, and red-green color blindness is X-linked recessive.
How many of their daughters might be expected to be color-blind dwarfs?
A) allB) none
C) half
D) one out of four
E) three out of four
Answer: B
What proportion of their sons would be color-blind and of normal height? A) none
B) halfC) one out of four
D) three out of four
E) all
Answer: B
They have a daughter who is a dwarf with normal color vision. What is the probability that she is heterozygous for both genes?
A) 0%B) 25%
C) 50%
D) 75%
E) 100%
Answer: E
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