During a cytological study conducted on the chromosomes of insects, it was observed that only $50 %$ of the sperms had a specific structure after spermatogenesis. Name the structure and write its significance in sex determination of insects.

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Solution

This structure is sex chromosome or usually known as X chromosome in insects. A lot of Insects have 'XO' type of sex determination where females have 'XX' while males have a single 'X' chromosome ( denoted by 'X0' ). Hence, after spermatogenesis, only 50% of gametes have this structure ( X chromosome ) while other 50% are without X chromosome.
Sperms with X chromosome fuse with ovum resulting in female offspring while those without X chromosome fuses with ovum to form male offspring.

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During a cytological study conducted on the chromosomes of insects, it was observed that only 50% of the sperms had a specific structure after spermatogenesis. Name the structure and write its significance in sex determination of insects.

During a cytological study conducted on the chromosomes of insects, it was observed that only $50 %$ of the sperms had a specific structure after spermatogenesis. Name the structure and write its significance in sex determination of insects.