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Down's Syndrome

Which of the ...

Question

Which of the following is not an example of recessive autosomal disease?

A

Haemophilia

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B

Cystic fibrosis

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C

Phenylketonuria

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D

Sickle-cell anaemia

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Solution

The correct option is A Haemophilia
Haemophilia is a sex-linked recessive disease in which the patient continues to bleed even from a minor cut since he or she does not possess the natural phenomenon of blood clotting. Genetically haernophilia is caused due to the presence of a recessive gene h, carried by X-chromosome. Cystic fibrosis, phenylketonuria, sickle-cell anaemia, alkaptonuria, albinism etc. are-the examples of autosomal recessive disorders. So, the correct answer is 'Haemophilia'.

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Similar questions

Q. Pick out the correct statements:
(i) Hemophilia is a sex – linked recessive disease
(ii) Down’s syndrome is due to aneuploidy
(iii) Phenylketonuria is an autosomal recessive gene disorder
(iv) Sickle cell anaemia is an X-linked recessive gene disorder

Pick out the correct statements.

(i) Haemophilia is a sex-linked recessive disease.

(ii) Down's syndrome is due to aneuploidy.

(iii) Phenylketonuria is an autosomal dominant gene disorder.

(iv) Phenylketonuria is an autosomal recessive gene disorder.

(v) Sickle-cell anaemia is an X-linked recessive gene disorder.

Q. Pick out the correct statements.

I. Haemophilia is a sex linked recessive disease.
II. Inheritance pattern of haemophilia is the same as that of color blindness.
III. Phenylketonuria is an autosomal recessive gene disorder.
IV. Sickle cell anaemia is an X-linked recessive gene disorder.

Q. Assertion :Sickle-cell anaemia is an autosomal linked recessive disorder that can be transmitted if both parents are heterozygous for the gene. Reason: In sickle-cell anaemia, haemoglobin molecule undergoes polymerisation under low oxygen tension causing the change in shape of RBC.

Q. A man and a women who both appear normal have a child together, who has sickle cell anaemia. Sickle cell anaemia is an autosomal recessive trait. The woman becomes pregnant again and is told that she is carrying fraternal twins. What is the probability that both of the couple's twins will develop sickle cell anaemia

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