以下为句子列表:
英文: In meiosis, the association of four homologous chromatids seen during the pachytene stage of prophase.
中文: 减数分裂前期的粗线期中,四个同源的染色单体向联系形成的结构。
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英文: Pachytene in MEIOSIS ,the stage in mid-prophaseⅠ that is characterized by the contraction of paired homologous chromosomes.
中文: 粗线期:减数第一次分裂前中期中的一个阶段,以配对同源染色体浓缩为特征。
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英文: Pairing of homologous chromosomes (synapsis) commences at one or several points on the chromosome and is clearly seen during PACHYTENE of meiosis I.
中文: 同源染色体两两成对平行靠拢,这一现象也称联会,联会发生在染色体的一点或多点上,可以在减数第一次分裂的粗线期观察到。
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