. Botany of the living plant. Botany; Plants. 566 BOTANY OF THE LIVING PLANT Telophase. At the eighth and final stage of the first division {first telophase, Fig. 432, 7) two daughter nuclei are formed and pass into a short resting stage {interphase). Homotype Division. A second division follows quickly in which the centromeres now split ; as a consequence the process closely resembles an ordinary mitosis, the chromo- some-halves passing to opposite poles and thus into different tetraspores (Fig. 432, 8-10). The outstanding points of meiosis are : (1) It involves two nuclear divisions with onl
. Botany of the living plant. Botany; Plants. 566 BOTANY OF THE LIVING PLANT Telophase. At the eighth and final stage of the first division {first telophase, Fig. 432, 7) two daughter nuclei are formed and pass into a short resting stage {interphase). Homotype Division. A second division follows quickly in which the centromeres now split ; as a consequence the process closely resembles an ordinary mitosis, the chromo- some-halves passing to opposite poles and thus into different tetraspores (Fig. 432, 8-10). The outstanding points of meiosis are : (1) It involves two nuclear divisions with only one division of the chromo- somes. Hence, (2) It leads to a halving of the chromosome number (reduction). (3) Interchange of parts (crossing-over) occurs between the chromatids of each pair of homologous chromosomes. (4) The first division of meiosis distributes the four chromatids of each pair of homologous chromosomes, so that each daughter-cell receives two. (5) The second division distributes these two chromatids so that each granddaughter-cell (tetraspores) receives one. (6) The four chromatids of each chromosome pair are thus distributed at random among the four members of a tetrad of 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 Bower, F. O. (Frederick Orpen), 1855-1948; Wardlaw, C. W. (Claude Wilson), 1901-. London, Macmillan and Co. , ltd.
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