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Sickle-Cell Anaemia

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Question

With respect to phenylketonuria identify which statement is not correct.

A

It is an example of pleiotropy

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B

It is an error in metabolism

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C

It is a case of aneuploidy

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D

Caused due to autosomal recessive trait

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Solution

The correct option is A It is a case of aneuploidy
Phenylketonuria causes the amino acid to increase in the amount in the body, So, it is an error in metabolism.
An autosomal recessive disorder means two copies of an abnormal gene must be present in order for the disease or trait to develop.
PKU is an autosomal recessive disorder, caused by mutations in both alleles of the gene for phenylalanine hydroxylase (PAH), found on chromosome 12.
Aneuploidy is the state where humans have an abnormal number of chromosomes that cannot be related to this disease.
So, the correct answer is option C.

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Similar questions

Q. Pick out the correct statements.
(a) Haemophilia is a sex-linked recessive character
(b) Down's syndrome is due to aneuploidy
(c) Phenylketonuria is an autosomal dominant gene disorder
(d) Phenylketonuria is an autosomal recessive gene disorder
(e) Sickle cell anaemia is an X-linked recessive gene disorder

Q. Pick out the correct statements.
(a) Haemophilia is a sex-linked recessive disease.
(b) Down's syndrome is due to aneuploidy.
(c) Phenylketonuria is an autosomal recessive gene disorder.
(d) Sickle cell anaemia is an X-linked recessive gene disorder.

Pick out the correct statements

(a) Haemophilia is a sex linked recessive disease

(b) Down’s syndrome is due to aneuploidy

(c) Phenyl ketonuria is an autosomal recessive gene disorder.

(d) Sickle cell anaemia is an X – linked recessive gene disorder

Q. Assertion :Phenylketonuria and sickle-cell anaemia are autosomal recessive traits disorder.
Reason: In phenylketonuria due to lacks of phenylalanine hydroxylase AA-tyrosine is converted into phenylalanine (AA) while in sickle-cell anaemia valine is replaced by glutamic acid in

β

Q. Person ‘A’ is suffering from an inborn error of metabolism due to an autosomal recessive trait. This error results mental retardation in him. Person ‘B’ also have retarded mental development but in this person it is due to trisomy of a particular chromosome.

Select the correct option regarding person ‘A’ and person ‘B’.
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