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- If two different species are crossed, the offspring is often serile, owing to the nonpairing of the chromosomes necessary for gamete formation. 如果发生种间杂交,后代往往是不育的。因为配子形成所必需的染色体不配对。
- Meiosis, which usually precedes spore or, sometimes, gamete formation, halves the chromosome number to produce haploid gametes. 染色体数目减半通常发生在减数分裂产生孢子或往往是合子减数分裂形成单倍体配子时。
- Gametes may develop without fertilization, or meiosis may substantially precede gamete formation. 配子不经过受精也可能发育,若减数分裂先于配子形成,配子也可能发育。
- Generally meiosis occurs before gamete formation, resulting in the gametes being haploid (having half the normal number of chromosomes). 在配子形成前通常会发生减数分裂,产生单倍体的配子(染色体数为正常的一半)。
- Genetic Analysis of 2n Gamete Formation in Chinese Cabbage 大白菜2n配子发生的遗传分析
- The book has been styled in a modern format. 该书已按照现代版式制作。
- Her front teeth were irregular in formation. 她的门牙排列不整齐。
- They marched in parade formation. 他们以列队的阵式行进。
- The male gamete could not unite with the female. 雄配子不能与雌配子结合。
- The book is written in an episodic format. 这本书是以一种松散的形式写成的。
- It's the same book, but a new format. 还是那本书,但这是新的版式。
- The formation of two ordered files from one regular file. 把一个正规文件分成两个有序文件的过程。
- A male gamete produced by an antheridium. 游动精子孢子囊产生的雄蕊
- The natural process of bone formation. 成骨骨头形成的自然过程
- The formation and development of bodily tissues. 组织发生身体组织的形式的发育
- Formation of a placenta in the uterus. 胎盘形成胎盘在子宫中的形成过程
- The forcing of molten rock into an earlier formation. 侵入熔岩对早先形成岩石的直接进入
- gamete formation 配子形成
- A signal by bugle or drum for troops to come together in formation. 集合号,集合鼓部队集结时以吹号或击鼓发出的信号
- The attack is to wipe out data, to delete flies, or to format the hard disk. 常见的攻击方式是消除数据、删除文件或者格式化硬盘。