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Q.

The presence and absence of ‘X-chromosome’ determines the sex in grasshopper.

Choose the correct option with regard to the above statement.

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a

All sperms are without ‘X -chromosome’.

b

The males have a single ‘X-chromosome’.

c

The insects with ‘XX condition’ are males.

d

Half of the ova produced by females are without ‘X-chromosome’.

answer is B.

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Detailed Solution

The presence and absence of ‘X-chromosome’ determines the sex in grasshopper. The male grasshopper has only single X chromosome. The type of sex determination seen in grasshopper is XO-XX type.

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