gametes

The main significance of the work is not to attempt to generate gametes for couples who do not produce them naturally.

这项研究工作的主要意义并不在于试图为无法自然孕育下一代的夫妻产生配子。

Genetic drift is change in the genetic composition of a population arising as a consequence of sampling of gametes in a finite population.

所谓遗传漂变就是指：在一个有限的种群内，由于配子的随机取样使得遗传组成在种群内发生变化的现象。

senescent period Old age, a time when fish growth is extremely slow, arrested or negative and gametes are inferior or not produced.

衰退时期老年期，当鱼成长的非常慢，拘捕的时候或许是消极的，而配子是次级的或已不生产了。

Polyploids can arise by somatic doubling, by the fusion of unreduced gametes, and by means of a triploid bridge.

多倍体产生与体细胞染色体的加倍、未减数配子的融合以及一种叫三倍体桥的方法。

Another form of apomixis in which seeds develop from unfertilized gametes can also be termed parthenogenesis.

在另一种无融合生殖中，种子从未受精的配子中发育而来，这被称为孤雌生殖。

"Maybe that is affecting gametes in ways that are going to have consequences for the next generation, " she says.

莫里斯表示：“大概影响配子的方式也有可能对下一代产生影响。”

Karyogamy The fusion of two nuclei that exist within a common cytoplasm, as occurs in the formation of the zygote from two gametes.

同一个细胞中两个核之间的融合现象称为核配，核配发生在两个配子结合成合子的过程中。

Sexual reproduction The formation of new individuals by fusion of two nuclei or sex cells ( GAMETES ) to form a diploid ZYGOTE.

新的个体是由两个细胞核或性细胞（配体）融合形成二倍体受精卵发育而成。

The donation of gametes or embryo used ines cell research should be voluntary and valid informed consent must be obtained.

在人胚胎干细胞研究中所用配子或胚胎的捐赠应该是自愿的，必须获得有效的知情同意。

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）。

A comparison of chromosomes in the gametes of a related, sexually-producing lizard species (above) and the whiptail (below).

配子（精子或卵子——译注）中的染色体对比。上方是一种两性繁殖的蜥蜴，下方是鞭尾蜥蜴。

In both the male and female gametes, GSH is involved in the protection of these cells against oxidative damage.

在雄性和雌性配子中，谷胱甘肽起着保护精子和卵母细胞免受氧化损害的作用。

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。

The basic set of chromosomes in a species is the haploid set, usually found in the gametes.

一个物种染色体的基本数目是一个单倍体组，这通常见于配子中。

The formation of unreduced gametes leads to spontaneous chromosome doubling, which has a great significance in the origin of common wheat.

未减数配子的形成导致了染色体自动加倍，这在普通小麦起源中具有重要意义。

Diplont A diploid organism that represents the vegetative stage in life cycles in which haploidy is restricted to the gametes.

代表生活史中植物体阶段的二倍体生物，其单倍体仅局限于配子体。

Gametes showed intensive positive phototaxis, after syngamy, motile zygotes showed negative phototaxis.

其配子具有明显的正趋光性，合子具有负趋光性。

In unicellular organisms whole individuals may unite but in most multicellular organisms only the gametes combine.

单细胞生物常发生整体的融合，而多细胞中只有配子发生融合。

The formation of a zygote by the union of genetically different gametes.

异型接合通过基因不同的配子的结合而产生合子的构造。

The drones such as bees, body cells contain the gametes of this species were off the number of individuals, called haploid.

像蜜蜂的雄蜂这样，体细胞中含有本物种配子的染色休数目的个体，叫做单倍体。