1. German biologist, Henking in 1891, was studying spermatogenesis of the squash bug (Anasa tristis). 2. He noted that 50% of sperms receive the unpaired chromosomes while other 50% sperms do not receive it. 3. Henking gave a name to this structure as the X-body. He was unable to explain its role in sex determination. 4. Further investigations by other scientists led to conclusion that the ‘X-body’ of Henking was a chromosome and gave the name as X-Chromosome to X-body.

X-body.

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X-body.

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German biologist, Henking in 1891, was studying spermatogenesis of the squash bug (Anasa tristis).
He noted that 50% of sperms receive the unpaired chromosomes while other 50% sperms do not receive it.
Henking gave a name to this structure as the X-body. He was unable to explain its role in sex determination.
Further investigations by other scientists led to conclusion that the ‘X-body’ of Henking was a chromosome and gave the name as X-Chromosome to X-body.

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