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Tuatara: Volume 13, Issue 1, April 1965
Fig. 9: Illustration of the type of evidence that shows that a chiasma represents an exchange of segments between non-sister chromatids of synapsed homologous chromosomes, a, a homologous pair of somatic chromosomes, one with a terminal deficiency, b, synapsis between such a pair of chromosomes at meiosis showing a cross-over and chiasma (as hypothesized) between the centromeres and abnormality, c, metaphase bivalent with one chiasma. d, anaphase I showing unequal chromatid arms of each chromos…
Fig. 9: Illustration of the type of evidence that shows that a chiasma represents an exchange of segments between non-sister chromatids of synapsed homologous chromosomes, a, a homologous pair of somatic chromosomes, one with a terminal deficiency, b, synapsis between such a pair of chromosomes at meiosis showing a cross-over and chiasma (as hypothesized) between the centromeres and abnormality, c, metaphase bivalent with one chiasma. d, anaphase I showing unequal chromatid arms of each chromosomes as a result of the cross-over (see text).