交配的

The gene targeted mice are commonly produced by breeding the heterozygous targeted mice following microinjecting the homologous recombinant ES cells into the blastocoele cavity of 3.5dpc embryos at the blastocyst stage to give birth to chimeric mice.

传统基因敲除获得某一突变基因的纯合体动物首先要利用打靶胚胎干细胞获得嵌合体动物；随后用嵌合体动物与野生型个体交配得到突变基因的杂合体动物；最后才能通过杂合体动物之间的交配来生产纯合体动物。

Limited by the population and generations, the local search ability is not good. A new niche—Braham model is brought forward. In the Braham niche, the random mating mode between chromosomes is replaced by the mating mode based on the fitness of the chromosomes.

本文提出了一种新的小生境算子—婆罗门，将简单遗传算法中的随机交配改为根据染色体的适应度进行交配，提高了遗传算法局部搜索能力，有效地防止了基因漂移。

The author studied the changes in estradiol in female urine, mating behavior and factors influencing male mating investment in maske palm civet by using radioimmunoassay technique behavioral sampling techniques, and got the following results and conclusions

笔者使用同位素放射免疫分析方法研究了雌二醇在雌性果子狸繁殖中的变化过程、使用随机取样法和所有事件取样法研究了果子狸的交配行为和影响雄性果子狸交配投资的因素。得到以下结果和结论

Tenth. A series of mathematical model of genetic mechanism of common population have been established,they are mathematical description of genetic mechanism of common population, so the population that the population genetics researching have extended from panmixia population, inbreeding population,selfing population to common population. It will start the new research territory of population genetics and promote its development.

本文建立了普通群体遗传机制的一系列数学模型，这是对普通群体遗传机制的数学描述，它使群体遗传学所研究的群体由随机交配群体、近亲交配群体、自交群体扩展到普通群体。

A female vole showed no difference in any behavior between an unfamiliar and unmated male and an unfamiliar male which had just mated with a no experimentative oestrous female vole. A male vole visited and mated with the unmated females significantly more than the females mated before the experiment.

雄性布氏田鼠虽然对配偶和陌生雌鼠的选择差异不显著，但对陌生雌鼠的选择显著高于熟悉雌鼠；虽然在一些行为指标上对已交配与未交配雌鼠选择无显著性差异，但在访问次数和爬跨行为上差异显著。

To get his wish, Cattanach crossed a boxer with a tailless Welsh corgi, then took the tailless offspring that looked most like a boxer and mated it to other boxers.

为了实现这个愿望，卡塔那奇将拳师犬与威尔斯柯基犬进行交配，然后将接近拳师犬特征的后代再与其它的拳师犬交配。

In tetrapolarity mating system,A and B factor is two mating types locus locating different chromosome,only when two single spore mycelium form AαAβBαBβ,then can produce to dikaryon and complete whole sexual life history.Study according to the Eger.

在四极性交配系统中，A和B因子分别对应位于不同染色体上的两个交配型位点，两个单核菌丝相遇，只有当它们形成A1A2B1B2或者AαAβBαBβ型时，才能产生具有锁状联合的双核体，完成整个有性生活史。

Sperm storage is a reproductive strategy in bats. Some species of bats can store mature spermatozoa in epididymis or oviducts and uterus for months.

精子储存是蝙蝠的生殖对策之一，有些种类的蝙蝠能将成熟精子在交配前或交配后储存在附睾或者输卵管及子宫内数月。

Mating success varies widely from bird to bird, with number of copulations per individual during the breeding season ranging from zero to several dozen.

鸟与鸟之间的交配成功率差别很大，个体在繁殖季节的交配次数从0到几十次不等。

Mating success varies widely from bird to bird, with number of copulations per individual during the breeding season ranging from zero to several dozen.

鸟与鸟之间的交配成功率差别很大，个体在繁殖期间的交配次数从0到几十次不等。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐