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Anish is having colour blindness and mar...

Anish is having colour blindness and married to Sheela, who is not colourblind. What is the chance that their son will have the disease?

A

1

B

0.5

C

0.25

D

0

Text Solution

Verified by Experts

The correct Answer is:
D
Colour bliindness is a sex-linked recessive disorder which results in defects in which eye fails to distinguish between red and green colour. The gene for colour blindness is located on X-chromosome.
Thus if a colourblind man marries a normal woman the chance for their son to be colorblind is 0% because son will receive X-chromosome from his mother (who is not colour blind) and Y from the father (as gene of colour blindness is present on X, So ,Y-chromosome is not affected Infact their girl child (daughter) will be the carrier of the disease. This can be easily illustracted by the cross given below
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ARIHANT NEET-HUMAN GENETICS-Chapter Exercise (c) Medical entrances gallery (Collection of questions asked in NEET & Various Medical Entrance Exams)
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  2. In sickle cell anaemia, the sequence of amino acid from first to seven...

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  3. Anish is having colour blindness and married to Sheela, who is not col...

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  4. The genotype of a person suffering from Klinefelter's symdrome is

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  5. In alpha thalasssemia the gene HBAI is located on chromosome

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  6. Sickle-cell anaemia is caused due to the substitution of :

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  7. Down's syndrome is an example

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  8. In down's syndrome (Mongolism), each cell has how many chromosomes?

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  9. In the given pedigree, the shaded individuals are homozygous recessive...

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  10. Haemophilia is related to

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  11. The gene of sickle cell anaemia is inherited by

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  12. Represented below is the inheritance pattern of a certain type of trai...

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  13. A normal - visioned man whose father was colourblind. Theiy have their...

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  14. A woman with albinic father marries an albinic man. The proportion of ...

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  15. Which following pair of diseases is caused by two genes located on hum...

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  16. If father shown normal gentype and mother shown a carrier trait for ha...

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  17. Cri-du-chat syndrome in humans is caused by the :

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  18. Colour blindness is caused due to

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  19. The chromosomal condition in Turner's syndrome is or A human female ...

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  20. A hereditary disease which is never passed on from father to son is :

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