In the following hereditary disorder, the defective gene cannot be passed from father to son
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a
Hypertrichosis
b
Phenylketonuria
c
Sickle cell disease
d
Colour blindness
answer is D.
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Detailed Solution
Hypertrichosis is Y-linked; It is always passed from father to son.Phenylketonuria and sickle cell anaemia are autosomal disorders; There is probability of these disease traits can be passed from father to son.In colour blindness, the male gets the defective gene from female parent (not form the father).