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Inheritance of Red-Green Colour Blindness

if both paren...

Question

if both parents are carriers of lethal recessive gene , the probability that their child will inherit and express the disorder is1) 1/82) 1/4

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Solution

2) 1/4.
Aa x Aa (carrier parents)
$↓$
AA, Aa, Aa, aa
i.e. 1 out of 4 will express the disorder.

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