Pick out the correct statements, Haemophilia is a sex-linked recessive disease.

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Q.
Pick out the correct statements. [2016]
(1) Haemophilia is a sex-linked recessive disease.
(2) Down’s syndrome is due to aneuploidy.
(3) Phenylketonuria is an autosomal recessive gene disorder.
(4) Sickle cell anaemia is an X-linked recessive gene disorder.

1 (1), (3) and (4) are correct

2 (1), (2) and (3) are correct

3 (1) and (4) are correct

4 (2) and (4) are correct

Ans.
(2)

Sickle-cell anaemia is an autosomal recessive genetic disorder. It can be transmitted from parents to the offspring when both the partners are carriers of the gene (or heterozygous).

Solution

Q.
Pick out the correct statements. [2016]
(1) Haemophilia is a sex-linked recessive disease.
(2) Down’s syndrome is due to aneuploidy.
(3) Phenylketonuria is an autosomal recessive gene disorder.
(4) Sickle cell anaemia is an X-linked recessive gene disorder.

1 (1), (3) and (4) are correct

2 (1), (2) and (3) are correct

3 (1) and (4) are correct

4 (2) and (4) are correct

Ans.
(2)

Sickle-cell anaemia is an autosomal recessive genetic disorder. It can be transmitted from parents to the offspring when both the partners are carriers of the gene (or heterozygous).

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Solution

Q. Pick out the correct statements. [2016] (1) Haemophilia is a sex-linked recessive disease. (2) Down’s syndrome is due to aneuploidy. (3) Phenylketonuria is an autosomal recessive gene disorder. (4) Sickle cell anaemia is an X-linked recessive gene disorder.

1 (1), (3) and (4) are correct

2 (1), (2) and (3) are correct

3 (1) and (4) are correct

4 (2) and (4) are correct

Ans. (2) Sickle-cell anaemia is an autosomal recessive genetic disorder. It can be transmitted from parents to the offspring when both the partners are carriers of the gene (or heterozygous).

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Q.
Pick out the correct statements. [2016]
(1) Haemophilia is a sex-linked recessive disease.
(2) Down’s syndrome is due to aneuploidy.
(3) Phenylketonuria is an autosomal recessive gene disorder.
(4) Sickle cell anaemia is an X-linked recessive gene disorder.

Ans.
(2)

Sickle-cell anaemia is an autosomal recessive genetic disorder. It can be transmitted from parents to the offspring when both the partners are carriers of the gene (or heterozygous).