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More men suffer from colour blindess tha...

More men suffer from colour blindess than women because

A

Women are more resistant to disease than men

B

The male sex hormone testosterone causes the disease

C

The colourblind gene is carried on the Y-chromosome

D

Men are hemizygous and one defective gene is enough to make them colourblind

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The correct Answer is:
D
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ARIHANT NEET-HUMAN GENETICS-Chapter Exercise (c) Medical entrances gallery (Collection of questions asked in NEET & Various Medical Entrance Exams)
  1. A hereditary disease which is never passed on from father to son is :

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  2. Absence of one sex chromosome causes

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  3. More men suffer from colour blindess than women because

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  4. Which one of the following symbols and its representation, used in hu...

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  5. If a colourblind woman marries a normal visioned man, their sons will ...

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  6. Haemophilia in man is due to

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  7. Colour blindness is due to defect in

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  8. Gynaecomastia is a common feature seen in

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  9. Study the pedigree chart given below What does it show?

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  10. Which one of the following conditions in humans is correctly matched ...

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  11. Barr body in mammals represent

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

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  13. Which of the following abnormalities, results from an unnatural presen...

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  14. The "cri-du-chat" syndrome is caused by change in chromosome structure...

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  15. The daughter born to haemophilic father and normal mother could be

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  16. XO-chromosomal abnormally in human beings causes

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  17. Which of these statement about Huntington's disease is true ?

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  18. Both husband and wife have normal vision though their father were colo...

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  19. Select the correct bases of DNA, RNA and amino acid of beta chain resu...

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  20. Pic out the correct stataments (I) Haemophilia is a sex-linked rece...

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