International Congress of Arts And Science volume 9
International Congress of Arts And Science volume 9
International Congress of Arts And Science 1904
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FIG. 5. Egg- and sperm-nucleus approach each other until they touch, but do not unite. In order to distinguish their chromosomes those of the egg-nucleus are drawn as a white circle (wch), those of the sperm -nucleus as a black circle (inch), as was done in the previous Figs. 1 to 4. FIG. 6. Egg- and sperm-nuclei have together formed a spindle of whose four chromosomes half (wch) arise from the egg-nucleus, the other half (mch) from the sperm-nucleus. The polar cells, as m Figs. 7 and 8, have b...een omitted. 300 EMBRYOLOGY Rq. 7.
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