The given chart shows a pedigree analysis. Wh | vedclass

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(B) $1$. In the given pedigree,the parents are unaffected (unshaded),but they have affected (shaded) offspring of both sexes (a male and a female). $2

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Genetic condition like Phenylketonuria,which is an autosomal recessive trait.

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(B) $1$. In the given pedigree,the parents are unaffected (unshaded),but they have affected (shaded) offspring of both sexes (a male and a female). $2$. This pattern of inheritance,where unaffected parents produce affected offspring,is characteristic of an autosomal recessive trait. $3$. Phenylketonuria is a well-known example of an autosomal recessive disorder. $4$. Sex-linked recessive traits (like Haemophilia) typically show a different pattern,often affecting males more frequently and skipping generations in a specific way related to the $X$-chromosome. $5$. Therefore,the pedigree represents an autosomal recessive trait like Phenylketonuria.

The given chart shows a pedigree analysis. What does it represent?

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Assertion $(A) :$ Phenylketonuria is an inborn error of metabolism and inherited as the autosomal dominant trait.
Reason $(R) :$ The disease is caused by mutation in the gene that codes for the enzyme phenylalanine hydroxylase.

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