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If both parents of a male child are norm...

If both parents of a male child are normal,what are the chances of the child being colour blind ?

A

It is impossible

B

It is possible only if mother's father was colourblind

C

It is possible only if father's mother was colourblind

D

It is possible even when all the four grandparents have normal vision

Text Solution

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The correct Answer is:
B
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ARIHANT NEET-HUMAN GENETICS-Chapter Exercises A Taking it together (Assorted Questions of the Chapter for Advanced level Practice )
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  2. The colour blindness is more likely to occur in males than in females ...

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  3. If both parents of a male child are normal,what are the chances of the...

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  4. This pedigree is of a rare trait, in which children have extra fingers...

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  5. Haemophilia is a condition where there is :

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  6. Haemophilic female marries normall male, the theoretical ratio of thei...

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  7. Which studying a human blood smear, it was noticed that several white ...

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  8. Edwrd's, patau's and down's syndrome are

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  9. Which is not an X- linked recessive disease?

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  10. Brachydactyly is due to:

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  11. Which of the following should be avoided in biological marriages ?

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  12. Sex -linked chromosomes of man are

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

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  14. In man, four phenotypes of blood groups are due to the presence of ant...

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  15. Sex-linked traits are

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  16. Both sickle-cell anaemia and huntingon's chorea are

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  17. A Rh^-mother carrying a Rh^- child then :

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  18. One child is haemophilic (sex-linked trait), while its fraternal twins...

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  19. One of the genes present exclusive on the X- chromosome in humans is c...

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  20. A man suffering from a disease marries a normal woman and they have fi...

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