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单词 Meiotic division
释义

Meiotic division

原声例句
日常生活医学科普

Telophase 1 The first meiotic division effectively ends when the chromosomes arrive at the poles.

末期 1当染色体到达两极时,第一次减数分裂有效地结束。

日常生活医学科普

Centrosomes move to the polar regions and arrange spindle fibers for the second meiotic division.

中心体向两极移动,组装纺锤体。

日常生活医学科普

Meiosis 2 Meiosis 2 is the second meiotic division and usually involves equational segregation, or separation of sister chromatids.

减数分裂 2减数分裂 2 是减数分裂的第二次分裂,通常涉及相等的分离,或姐妹染色单体的分离。

英语百科

Meiosis

In meiosis, the chromosomes duplicate (during interphase) and homologous chromosomes exchange genetic information (chromosomal crossover) before a first division, called meiosis I. The daughter cells divide again in meiosis II, splitting up sister chromatids to form haploid gametes. Male and female gametes fuse during fertilization, creating a diploid cell with a complete set of paired chromosomes.
A video of meiosis I in a crane fly spermatocyte, played back at 120× the recorded speed.
Gametic life cycle.
Zygotic life cycle.

Meiosis /mˈss/ is a specialized type of cell division that reduces the chromosome number by half. This process occurs in all sexually reproducing single-celled and multicellular eukaryotes, including animals, plants, and fungi. Errors in meiosis resulting in aneuploidy are the leading known cause of miscarriage and the most frequent genetic cause of developmental disabilities.

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更新时间:2025/6/19 0:07:14