Archive image from page 22 of Cytological studies of five interspecific. Cytological studies of five interspecific hybrids of Crepis leontodontoides cytologicalstudi65aver Year: 1930 1930] Avery: Hybrids of Crepis leontodontoides 155 Meiosis In meiotic divisions the chromosomes of the two species cannot be distinguished. In contrast to the other hybrids there is great regularity in meiosis. At diakinesis 5n or 4n + 2r are seen. In figure 15a one pair of chromosomes appears to be only loosely associated Fig. 15. Meiosis in Ft C. leontodontoides-aurea. a, diakinesis, with five pairs, one pa
Archive image from page 22 of Cytological studies of five interspecific. Cytological studies of five interspecific hybrids of Crepis leontodontoides cytologicalstudi65aver Year: 1930 1930] Avery: Hybrids of Crepis leontodontoides 155 Meiosis In meiotic divisions the chromosomes of the two species cannot be distinguished. In contrast to the other hybrids there is great regularity in meiosis. At diakinesis 5n or 4n + 2r are seen. In figure 15a one pair of chromosomes appears to be only loosely associated Fig. 15. Meiosis in Ft C. leontodontoides-aurea. a, diakinesis, with five pairs, one pair loosely associated; b, and c, I—M, with five bivalents; d, I-M, with four bivalents; e, I-M, with four bivalents and one pair loosely conjugated. while the other four pairs are normally conjugated. The same amount of variation in pairing is found at the first metaphase, 5n being most frequent (figs. 15& and 15c), but 4n + 2i also occur (fig. 15d) together with many cases of four pairs plus two loosely associated chromo-
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