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Updated: May 23, 2025
Life appears to have perfected this trick of separate sexes, sex specialization, in short, for the sake of the efficiency which goes with specialization. When a germ cell divides, its nuclear material breaks up into segments known as chromosomes. Now it has been found, for example in the case of the common squash bug, anasa tristis, that there are 22 chromosomes in the female, and 21 in the male.
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