How do you do a punnett square that is X-linked. X3 Problem: A dwarf man with Achondroplasia and normal vision marries a color-blind woman of normal height. The man’s father was 6 foot tall, and the women’s parents were of normal height. Achondroplasia is autosomal dominant, red-green color blindness is X-linked recessive. How many of their daughters will be expected to be color blind with Achondroplasia?