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. they have a daughter who is a dwarf with normal color vision. what is the probability that she is heterozygous for both genes?