. Cytology, with special reference to the metazoan nucleus. Cells. CONTINUITY OF THE CHROMOSOMES 133 The grouping of the chromosomes derived from the male and female parents which is to be seen in the first few cleavage divisions is of course an example of gonomery, such as occurs in Cyclops, etc. (Fig. 35), and, as usual, disappears in later cleavages. The important fact is that the two types of chromosomes introduced by the two parents, though mingled together, are recognizable in all mitoses. From this we conclude that their loss of identity in the resting nucleus is apparent only, and not
. Cytology, with special reference to the metazoan nucleus. Cells. CONTINUITY OF THE CHROMOSOMES 133 The grouping of the chromosomes derived from the male and female parents which is to be seen in the first few cleavage divisions is of course an example of gonomery, such as occurs in Cyclops, etc. (Fig. 35), and, as usual, disappears in later cleavages. The important fact is that the two types of chromosomes introduced by the two parents, though mingled together, are recognizable in all mitoses. From this we conclude that their loss of identity in the resting nucleus is apparent only, and not real. In the Lepidopteran cross Lycia hirtaria x Ithysia zonaria (Harrison. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Agar, Wilfred Eade, 1882-. London, Macmillan
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