Assertion : Phenylketonuria is a recessive hereditary disease caused by body’s failure to oxid

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4.Principles of Inheritance and Variation

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Assertion : Phenylketonuria is a recessive hereditary disease caused by body’s failure to oxidize an amino acid phenylalanine to tyrosine, because of a defective enzyme.

Reason : It results in the presence of phenylalanine acid in urine.

If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

If both Assertion and Reason are correct but Reason is not a correct explanation of the Assertion.

If the Assertion is correct but Reason is incorrect.

If both the Assertion and Reason are incorrect.

(AIIMS-2000)

Solution

Phenylketonuria is an recessive autosomal gene disorder. It occurs due to the absence of enzyme phenylalanine hydroxylase which changes phenylalanine to tyrosine.

Standard 12

Biology

Mendel studied on pea plant in

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Twin is

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In which of the following disorder a single protein that is a part of the cascade of proteins involved in blood clotting is affected?

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Heterozygous tall and violet flowered pea plants were selfed and total $512$ seeds are collected. What will be total number of seeds for both heterozygous traits?

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The dwarfness in plants of $F_2$ generation is

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Assertion : Phenylketonuria is a recessive hereditary disease caused by body’s failure to oxidize an amino acid phenylalanine to tyrosine, because of a defective enzyme. Reason : It results in the presence of phenylalanine acid in urine.

Solution

Similar Questions

Mendel studied on pea plant in

Twin is

In which of the following disorder a single protein that is a part of the cascade of proteins involved in blood clotting is affected?

Heterozygous tall and violet flowered pea plants were selfed and total $512$ seeds are collected. What will be total number of seeds for both heterozygous traits?

The dwarfness in plants of $F_2$ generation is

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Assertion : Phenylketonuria is a recessive hereditary disease caused by body’s failure to oxidize an amino acid phenylalanine to tyrosine, because of a defective enzyme.

Reason : It results in the presence of phenylalanine acid in urine.