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A colour blind man marries a woman with ...

A colour blind man marries a woman with normal sight who has no history of colour blindness in her family.What is the probablity of their grandson being colour blind ?

A

0.25

B

0.5

C

1

D

Nil

Text Solution

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The correct Answer is:
B
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AAKASH INSTITUTE-PRINCIPLES OF INHERITANCE AND VARIATION-Assignment (SECTION-C) Previous Years Questions
  1. Match the terms in Column I with their description in Column II and ch...

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  2. Pick out the correct statements (A) Haemophilia is a sex-linked rece...

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  3. A colour blind man marries a woman with normal sight who has no histor...

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  4. the term 'linkage' was coined by :

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  5. A pleiotropic gene:

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  6. In his classic experiment on Pea plants, Mendel did not use

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  7. A gene showing codominance has:

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  8. In the following human pedigree, the filled symbols represent the affe...

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  9. Alleles are:

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  10. The movement of a gene from one linkage group to an other is called

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  11. Multiple alleles are present:

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  12. An abnormal human baby with XXX sex chromosomes was born due to

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  13. How many pairs of contrasting characters in pea plants were studied by...

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  14. Fruit colour in squash is an example of

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  15. A man whose father was colour blind marries a woman who has a colour b...

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  16. A human female with turner's syndrome

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  17. In a population of 1000 individuals 360 belong to genototype AA ,480 ...

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  18. If both the parents are carriers for thalassemia which is an autoso...

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  19. The incorrect statement with regard to Haemophilia is

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  20. If two persons with 'AB' blood group marry and have suffieciently larg...

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