| 单词 | 染色单体 |
| 释义 | DEFINITIVE EXAMPLES 权威例句〔chromonema〕The spirally coiled central filament of a chromatid along which the chromomeres are aligned.染色线，染色丝：染色单体的中间丝状体螺旋盘绕在排成一列的染色粒上美国传统〔nondisjunction〕The failure of paired chromosomes or sister chromatids to separate and go to different cells during meiosis.（染色体的）不分开，不分离：在减数分裂过程中，成对的染色体或同型的染色单体不分离到不同的细胞中美国传统〔pachytene〕The third stage of the prophase of meiosis during which the homologous chromosomes become short and thick and divide into four distinct chromatids.粗线期：在同周期的染色体群变短变粗并分裂为四个不同的染色单体过程中减数分裂前期的第三个阶段美国传统〔polycentric〕Having several central parts, such as centrosomes or chromatids.多中心的：具有几个中心部分的，如有几个中心体或染色单体的美国传统〔tetrad〕A group of four chromatids formed from each of a pair of homologous chromosomes that split longitudinally during the prophase of meiosis.四分体：一组来自减数分裂中相互垂直分裂的一对同源染色体的四个染色单体美国传统 |
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