… The egg cytoplasm already contains a large amount of energy and information to maintain the cleavage stage and the subsequent morphogenesis process, and almost no new cytoplasm is synthesized throughout the cleavage stage. Therefore, the egg cytoplasm is distributed throughout the cleavage process to numerous blastomeres (the specific name for the cells that result from cleavage). Therefore, if the egg cytoplasm is heterogeneous, cells with various different cytoplasmic environments will be produced. … *Some of the terminology that mentions "blastomere" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
… 卵の細胞質には,あらかじめ卵割期およびその後の形態形成の過程を維持するためのエネルギーや情報が大量に蓄えられており,新たな細胞質の合成は卵割期を通じてほとんど行われない。このため卵の細胞質は,卵割の過程を通じてそのまま多数の割球blastomere(卵割の結果として生じた細胞をとくにこう呼ぶ)に分配される。したがって卵細胞質に不均一がある場合には,さまざまに異なる細胞質環境をもった細胞が生ずることになる。… ※「blastomere」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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