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A colourblind man marries a woman with n...

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

A

`0.5`

B

1

C

Nil

D

`0.25`

Text Solution

Verified by Experts

The correct Answer is:
D
`0.25`
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KUMAR PRAKASHAN-PRINCIPLES OF INHERITANCE AND VARIATION -SECTION -F (MULTIPLE CHOICE QUESTIONS (MCQS)) (MCQs ASKED IN COMPETITIVE EXAM)
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  2. In his classic experiments on pea plants, Mendel did not use

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  3. A colourblind man marries a woman with normal sight who has no history...

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

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  5. The term "linkage" was coined by

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  6. A gene showing codominance has

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  7. The mechanism that causes a gene to move from one linkage group to ano...

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  8. what is true breeding line?

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  9. If a colourblind man marries a woman who is homozygous for normal colo...

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  10. A tall true breeding garden pea plant is crossed with a dwarf true bre...

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  11. Pick out the correct statements. I. Haemophilia is a sex-linked rece...

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  12. In a test cross involving F1 dihybrid flies, more parental-type offspr...

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  13. Match the terms in column - I with their description in column - II an...

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  14. A cell at telophase stage is observed by a student in a plant brought ...

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  15. Which of the following most appropriately describes haemophilia ?

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  16. A disease caused by an autosomal primary nondisjunction is

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  18. The genotypes of a husband and wife are I^A I^Band I^A i.. Among the b...

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  19. Among the following characters, which one was not considered by Mendel...

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  20. Which one from those given below is the period of Mendel.s hybridisati...

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