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Standard XII
Biology
Inheritance of Haemophilia
The incorrect...
Question
The incorrect statement with regard to Haemophilia is :
A
It is a sex-linked disease
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B
It is a recessive disease
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C
It is a dominant disease
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D
A single protein involved in the clotting of blood is affected
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Solution
The correct option is
C
It is a dominant disease
1.Hemophilia is an inherited bleeding disorder in which the blood does not clot.
2. It happens because of a defect in one of the clotting factor genes on the X chromosome.
3.X-linked recessive disorder.
so, question is for incorrect statement so option c is the answer. that not an dominant disorder.
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Q.
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.
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Assertion :Haemophilia is a recessive sex linked disease. Reason: Haemophilia occurs due to mutation of a structural gene on chromosome 15.
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Haemophilia is a sex-linked recessive disease. Study the pedigree analysis given showing the inheritance of the disease in a family and answer the questions that follow.
Give the evidence from the analysis, which suggests that the disease is sex-linked and caused by a recessive allele.
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Pick out the correct statements (a) Haemophilia is a sex-linked recessive disease (b) Down syndrome is due to aneuploidy (c) Phenylketonuria is an autosomal recessive gene disorder (d) Sickle cell anaemia is X-linked recessive gene disorder.
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Haemophilia disease is linked with
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