X chromosome

Japanese: X 染色体 - えっくすせんしょくたい
X chromosome

… Sex chromosomes differ in their staining and behavior from other autosomes, and in higher animals, abnormal condensation is observed during the interphase and prophase of nuclear division. When the female has the same type (homo) sex chromosomes and the male has the different type (hetero), the different chromosome in the male is called the Y chromosome, and the same chromosome that exists in both sexes is called the X chromosome. In this type, as a result of maturation division (meiosis), two types of germ cells are formed, one with only X in the female and one with either X or Y in the male. …

*Some of the terminology that refers to the "X chromosome" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

… 性染色体は,それ以外の常染色体autosomeと比較してその染色性や行動がことなり,とくに高等動物では核分裂の間期や前期で異常凝縮などがみられる。性染色体の形態から雌が同型(ホモ)で,雄が異型(ヘテロ)の染色体をもつとき,雄にある異型染色体をY染色体,雌雄双方に存在する同型の染色体をX染色体とよぶ。この型においては成熟分裂(減数分裂)の結果,雌ではXのみ,雄ではXまたはYをもつ2種類の生殖細胞が形成される。…

※「X 染色体」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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