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Question

‘XO’ type of sex determination is seen in


A

Horses

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B

Drosophila

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C

Grasshopper

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D

Man

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Solution

The correct option is C

Grasshopper


Grasshoppers show XX-XO type of sex determination. The Y chromosome is missing, and so, the male has only one sex chromosome. The condition is XO in male and XX in female.

Human beings, horses and show XX-XY type of sex determination.

Birds show ZZ-ZW type of sex determination.


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