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- The megasporocyte undergoes the first meiotic division, giving rise to two dyad cells. 功能大孢子进行第二次减数分裂,形成二核胚囊。
- At a species-specific later point, a final ripening (ovulation) and the first meiotic division occur. 第一次减数分裂产生一个成熟卵。
- In dandelion (Taraxacum), for example, the chromosomes of the megaspore mother cell remain in one cell after the first meiotic division, forming a restitution nucleus. 例如在蒲公英中，在第一次减数分裂后，大孢子母细胞的染色体仍在一个细胞中，形成一个再组核。
- Since crossing over can occur during the first meiotic division, it does allow for some genetic variation in the offspring. 在第一次减数分裂的过程中可以发生交换现象，因而在后代中有遗传变化。
- To accomplish this, sister chromatids must segregate together during the first meiotic division (meiosis I) , which requires that sister chromatid cohesion persists at centromeres. 实现减数分裂，姐妹染色体必须在第一次分裂联会，这过程姐妹染色体在着丝粒结合。
- first meiotic division 第一减数
- Oocyte resumed the second meiotic division. 后期将染色体拉向两极；
- The oocytes undergoing meiotic division sequentially extrude the first and the second small polar bodies from the large oocytes. 卵母细胞在减数分裂过程中相继排出第一和第二极体。
- It followed a normal course up to first meiotic metaphase when it inexplicably failed. 它按正常减数分裂过程进行到第一次减数分裂中期后就莫名其妙地停止了。
- A cell from which gametes develop by meiotic division,especially a spermatocyte or an oocyte. 配子母细胞，配子细胞配偶子通过配子减数分裂而发展的细胞，尢指精母细胞或卵母细胞
- A haploid cell that results from the meiotic division of an oocyte and becomes a female gamete or an ovum. 卵（子）细胞由于卵母细胞减数分裂产生而后形成配子或卵细胞的单倍体细胞
- A cell from which gametes develop by meiotic division, especially a spermatocyte or an oocyte. 配子母细胞，配子细胞配偶子通过配子减数分裂而发展的细胞，尢指精母细胞或卵母细胞
- A second meiotic division, followed by development of the embryo, takes place if the egg is fertilized. 如果卵受精，那么第二次减数分裂伴随胚胎的发育。
- The oocytes release from the MII arrest complete the meiotic division till fertilization or parthenogenetic activation. 直至受精或孤雌活化,卵母细胞才能最终完成减数分裂。
- The processes of meiotic division of pollen mother cells were compared between male sterile plants and male fertile ones. 摘要以萝卜雄性不育株与可育株为试材，比较研究了不育与可育花粉母细胞的减数分裂过程。
- As a result of cytological observation,there are about 33%pollen mother celles that the behavior of meiotic division is abnormal. 细胞学观察发现约33%25的花粉母细胞减数分裂过程异常。
- The second meiotic division thus gives rise to two cells with the diploid number of chromosomes, one of which divides parthogenetically to form an cmbryo. 在第二次减数分裂中上升为两个细胞包含双倍体的染色体数目，其中的一个分裂形成胚胎。
- Leaving her first job was a watershed in her life. 辞去她的第一份工作是她生活中的一个转折点。
- Cook the meat quickly at first to seal in the juices. 一开始要大火烧肉，以便保存肉汁。
- In the word "mother" the stress is on the first syllable. 在"mother"这一字里，重音在第一个音节上。,在＂mother＂这一字里，重音在第一个音节上。
