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Turner syndrome is caused by...

Turner syndrome is caused by

A

autosomal Aneuploidy

B

sex chromosome aneuploidy

C

polyploidy

D

trisomy

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The correct Answer is:
B
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Assertion : Turner's syndrome is caused due to absence of any one of the X and Y sex chromosome Reason : Such individuals show masculine as well as feminine development.

Chromosomal disorders are caused due to absence or excess or abnormal arrangement of one or more chromosomes. Failure of segregation of chromatids during cell division cycle results in the gain or loss of a chromosome, and is called aneuploidy. Failure of cytokinesis after telophase stage of cell division results in an increase in a whole set of chromosomes in an organism and, this is known as polyploidy. Turner's syndrome is caused due to ............... of one of the X chromosome.

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TRUEMAN BIOLOGY-PRINCIPLES OF INHERITANCE AND VARIATIONS -MCQs
  1. How many barr bodies Klinefelter syndrome (XXY) has?

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  2. Which of the following does not undergo transcription of its genes?

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  3. Turner syndrome is caused by

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  4. Down's syndrome or Mongoloid idiocy (Mongolism) is due to

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  5. Phenylketonuria, Huntington's disease and sickle-cell anaemia are caus...

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  6. Genetic constitution of Klinefelter syndrome is

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  7. Which one of the following conditions through harmful in itself, is al...

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  8. Genetic constitution of superfemale is

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  9. In human beings, male is 44A+XY and female 44A+XX. Which of the follow...

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  10. If the chromosome number of a trisomic is 25 what will be its correspo...

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  11. What would be the sex of Drosophila with 3A+XXY genetic constitution?

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  12. The number of barr bodies in normal male and normal female is

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  13. Turner's syndrome is

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  14. If haploid number is 10, what would be the number of monosomic and tet...

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  15. Down's syndrome is an example of

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  16. Webbed neck' is a characteristic of :

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  17. Barr body in normal female is due to inactivation of

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  18. Carrier organism refers to an individual which carries a

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  19. A woman has haemophilic brother and normal parents. She wants to marry...

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  20. The grandsons of a colour blind male through daughter having the follo...

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