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Choose the incoorrect statement....

Choose the incoorrect statement.

A

In grasshoppers, besides autosomes males have only one X-chromosome, whereas females have a pair of X-chromosomes

B

In XY type of sex-determinatin, both males and females have same number of chromosomes

C

In Drosophila, males have one X and one Y chromosome, whereas females have a pair of X-chromosome besides autosomes

D

In Birds, females have one Z and one. W- chromosomes, whereas males have a pair of Z-chromosomes besides autosomes

Text Solution

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The correct Answer is:
C
IN XO type of sex determinition in insects, all sperm do not bear X-chromosomes. Males have only one X-chromosome and female have pair of X-chromosomes. Egge fertilised by sperms having X-chromosome become females and those fetilised bysperms that do not have X-chromosome become males.
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