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The sperm must not have undergone meiotic division...

精液不能已经遭遇减数分裂的区分。。。

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。

The in vitro meiotic process and developmental competence of buffalo oocytes from different size follicles was investigated.

探讨了不同大小水牛卵泡卵母细胞体外成熟过程中的减数分裂进程及其胚胎发育潜能。

Triggers the egg's final meiotic reduction divisions.

融合也触发了最后的减数分裂。

In addition, the journal publishes key papers on chromosome aberrations in somatic, meiotic and malignant cells of man and other animals.

此外, 该刊还发表体细胞染色体失常,细胞减数分裂和人体与其他动物恶性细胞的论文。

In mixoploid plants, somatic cells with 2n=25~29 were most frequent except for a few haploid cells (2n=19) and chromosome doubling cells (2n=50~60). Abnormal chromosome behaviors were observed in pollen mother cells from mixoploid BI-1 and haploid, including chromosome bridges, laggard chromosomes, meiotic cycle asynchrony and unequal separation of chromosomes.

对混倍体植株BI-1和单倍体植株的花粉母细胞(Pollen mother cells,PMCs)减数分裂染色体行为观察发现,高频率出现染色体落后、染色体桥、染色体分裂周期不同步、不均等分离等异常染色体行为。

In the anthers of China CMS lines,there is normaldifferentiation of anther walls,male sterility is characterizedby the abortion of sporogenous cells and microsporemother cells.

我国棉花细胞质雄性不育的败育时期主要集中在造孢细胞增殖时期和花粉母细胞减数分裂时期。

Perenial flowering planrs of Strelitzia reginae are used as material. The First meiosis young flowers are induced with different concentration colchicines (0.05%, 0.10%, 0.20%).

以多年生开花鹤望兰植株为试验材料,采用不同浓度秋水仙素(0.05%, 0.10%, 0.20%)对鹤望兰处于减数分裂Ⅰ期的幼小花蕾进行诱导。

It is therefore inferred that F〓 hybrid may have produced functional unreduced male gametes from which the green plants originated .

由此推测:F1杂种能产生有功能的不减数雄配子,并能进一步再生出绿色花粉植株。

Meanwhile, by either artificial chromosome doubling via colchicine treatment or spontaneous chromosome doubling via a union of unreduced gametes (2n) from T. turgidum-Ae.

同时,通过秋水仙碱对四倍体小麦-节节麦杂种进行染色体人工加倍或利用未减数配子自然加倍,我国科学家创制了一些新的人工合成小麦。

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推荐网络例句

The labia have now been sutured together almost completely.The drains and the Foley catheter come out at the top.

此刻阴唇已经几乎完全的缝在一起了,排除多余淤血体液的管子和Foley导管从顶端冒出来。

To get the business done, I suggest we split the difference in price.

为了做成这笔生意,我建议我们在价格上大家各让一半。

After an hour and no pup, look for continued contractions and arching of the back with no pup as a sign of trouble.

一个小时后,并没有任何的PUP ,寻找继续收缩和拱的背面没有任何的PUP作为一个注册的麻烦。