以下为句子列表：
英文: A species can be characterized by its karyotype since the number, size, and shape of chromosomes vary greatly between species but are fairly constant within species.
中文: 由于不同物种的染色体数目、大小和形状有很大区别并且具有稳定性，因此核型可以为某一物种的特征。
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英文: Karyotype The physical appearance of the chromosome complement of a given species.
中文: 核型：一个给定物种的染色体所表现出的物理学特征。
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英文: Karyotyping for adanced maternal age was performed by amniocentesis and demonstrated a normal male karyotype (46 XY with G-banding).
中文: 对此高龄孕妇行羊膜穿刺染色体组型分型检查，先是正常男性（46XY，G带显带技术）。
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英文: The experiment was carried out with six-group oppositifolious and alternate sister-lines through oppositifolious character transferring, initially analysing their differences in chromosomal karyotype with the method of essential balm.
中文: 摘要本文利用对生性状转育获得的六组对生和互生姊妹系，通过风油精法染色体制片，首次研究了对生玉米与互生玉米的染色体核型差异。
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英文: The karyotype of Nelumbo nucifera during meiosis zygotene was established in this study, which would help the studies of meiosis and molecular cytogenetics in lotus.
中文: 摘要本研究建立了中国莲偶线期染色体的核型，为研究莲的减数分裂过程及分子细胞遗传学研究提供基础。
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