...In this case, as shown in Figure c, the sister chromatids shown in black or white do not separate but open toward the same side, so it is also called the one-sided theory (Figures c, d). In response to this, K. Sax proposed the two-sided theory in 1930, and L. W. Sharp proposed the two-sided theory in 1934. According to this theory, as the separation of paired chromosomes progresses, sister chromatids pair up in the ring containing the centromere (center of Figure e), and homologous chromatids pair up in the ring next to it (the ring outside the arrow in Figure e), so separation occurs on two sides (Figures e, f). ... *Some of the terminology that mentions "Sharp, LW" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…この場合,図cに示すように,黒色または白色で示した姉妹染色分体が分離せずに同じ側に向かって開くので,一面説とも呼ばれる(図c,d)。これに対して30年サクスK.Saxが,また34年シャープL.W.Sharpが二面説を提唱した。この説によると,対合した染色体の分離が進むにつれ,動原体を含む環状部では姉妹染色分体が組になり(図eの中央部),その隣の環状部では相同染色分体どうしが組になる(図eの矢印の外側の環状部)というように,二つの面で分離がおこると考える(図e,f)説である。… ※「Sharp,L.W.」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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