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Question
Albinism in human is controlled by a recessive gene 'a'. If both parents were known to be carriers (Aa) for albinism, what are the chances of 1 normal and 3 albinoes in a family of four?
Albinism in human is controlled by a recessive gene 'a'. If both parents were known to be carriers (Aa) for albinism, what are the chances of 1 normal and 3 albinoes in a family of four?
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Solution
The correct option is B 12/256
Parent 1 will have Aa and second parent will have Aa genotype when there are crossed offsprings produced will be AA, Aa, Aa, aa, the chances of affected offspring is 25% rest 75% will be normal. Probability will be (1/4 x 3/4 x (1/4)^3)= 12/256. So, the correct answer is "12/256".
Parent 1 will have Aa and second parent will have Aa genotype when there are crossed offsprings produced will be AA, Aa, Aa, aa, the chances of affected offspring is 25% rest 75% will be normal. Probability will be (1/4 x 3/4 x (1/4)^3)= 12/256.
So, the correct answer is "12/256".
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