1. The number of chromosomes in male and female organisms having XO type of sex determination is same.
2. In large number of insects the mechanism of sex determination is XX – XO type.
3. Henking’s experiments was based on spermatogenesis in female insects
4. According to Henking’s 50% of sperms did not receive X-Body
From the above statements, identify incorrect statements.

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3 and 4

2 and 3

1 and 2

1 and 3

answer is D.

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Detailed Solution

The number of chromosomes in male and female organisms having XO type of sex determination varies. Females have AA+XX chromosomes while males have AA+XO (which means only one sex chromosome) is present.
Henking’s experiments was based on spermatogenesis in male insects.
In large number of insects the mechanism of sex determination is XX – XO type.
According to Henking’s 50% of sperms did not receive X-Body.

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