Created by StemPy LabTwo statements about the work of Henking (1891) are given below. Statement I: Henking found that all the sperms of the insects he studied received the nuclear structure that he traced through spermatogenesis. Statement II: Henking showed that this structure, the X body, was a chromosome that determines sex.
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← Read the following statements about sex determination.
(i) In grasshopper, sex is determined by the XO type, and the males have one chromosome fewer than the females.
(ii) Human males produce two kinds of sperms, so sex determination in humans is an example of male heterogamety.
(iii) In birds, the females have a Z and a W chromosome, while the males have a pair of Z chromosomes.
(iv) In the XO type, all the sperms carry an X chromosome.
(v) In humans, the type of ovum decides the sex of the child.
How many of the statements above are correct?Morgan found 1.3 per cent recombination between the genes for white eye and yellow body in *Drosophila*, and 37.2 per cent between the genes for white eye and miniature wing. Which conclusion is correct? →
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