1. ( 2 points ). In humans, cataracts in the eyes and fragility of the bones are

Question

1. (2 points). 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:

1a. be free from both abnormalities

1b. have cataracts and normal bones

1c. have fragile bones and normal eyes

1d. have both fragile bones and cataracts

please be very specific

Explanation / Answer

Man (Cc ff) x woman (cc Ff).

(a) cc ff, (1/2) x (1/2) = 1/4

(b) Cc ff, (1/2) x (1/2) = 1/4

(c) cc Ff, (1/2) x (1/2) = 1/4

(d) Cc Ff, (1/2) x (1/2) = 1/4

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