Study the pedigree chart given below. What do | vedclass

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(A) : This chart shows the inheritance of an autosomal recessive trait like phenylketonuria. An autosomal recessive trait may skip a generation. It ap

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Inheritance of a condition like phenylketonuria as an autosomal recessive trait.

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(A) : This chart shows the inheritance of an autosomal recessive trait like phenylketonuria. An autosomal recessive trait may skip a generation. It appears in the case of marriage between two heterozygous individuals $(Aa 	imes Aa = 3\ Aa + 1\ aa)$,a recessive individual with a hybrid $(Aa 	imes aa = 2\ Aa + 2\ aa)$,and two recessive individuals $(aa 	imes aa = 	ext{all } aa)$. Phenylketonuria is an inborn,autosomal,recessive metabolic disorder in which the homozygous recessive individual lacks the enzyme phenylalanine hydroxylase. The heterozygous individuals are normal but carriers.

Study the pedigree chart given below. What does it show?

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