In humans, cataracts in the eyes and fragility of the bones are caused by dominant alleles that assort independently. A man with cataracts and normal bones marries a woman without cataracts but with fragile bones. The man’s father had normal eyes, and the woman’s father had normal bones. What is the probability that the first child of this couple will

(a) Be free from both abnormalities; 

(b) Have cataracts but not have fragile bones; 

(c) Have fragile bones but not have cataracts; 

(d) Have both cataracts and fragile bones?