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Figure 3-2. The oocyte development of medaka. For details, see the text. A, animal pole; BB, yolk nucleus; OW, ovarian wall; PO1-2, follicles after ovulation; V, vegetal pole; Y, yolk; YV, yolk vesicle. (Reproduced from Iwamatsu et al., 1988, with permission of The Zoological Society of Japan. Copyright (1988) The Zoological Society of Japan.) |