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gamete n.【生物學】配子。

gametocyte

To the extent that an important function of marriage is to allow children to identify their biological parents and vice versa , with polygyny ( one man and several wives ) children can still know who their biological mother and father are ( at least they could prior to assisted reproductive technologies and donated gametes , and assuming no adultery - but that latter assumption also applies to monogamous marriage ) 婚姻的一個重要功能是允許子女識別生物學意義上的父母以及允許父母識別生物學意義上的子女,在這種意義上,一夫多妻制婚姻(一個男人和多個妻子)中的子女仍然可以知道自己親生母親和父親是誰(至少,假如沒有發生通奸的話,它可能優于輔助生殖技術和借精借卵生育? ?不過,關于通奸的假定也適用于一夫一妻制) 。

Fertilization is a highly programmed process by which two radically different cells , sperm and egg , unite to form a zygol it is mediated by complementary molecules present on the surface of the respective gametes . especially the proteins in the sperm acrom play an important role , but only a little can be extracted from sperm . now large amount of proteins can be obtained easily using biological technique 受精是配子間相互作用最后融合成合子的過程,是由配子各自表面蛋白分子互補介導的,特別是存在于精子頂體的蛋白,但從精子中提取量少,用分子生物學手段大量克隆表達所需蛋白為受精機理的研究提供了方便。

Despite this progress , however , women who lack ovaries altogether and men whose testicles have failed to develop or have been removed must still use donor gametes if they wish to have a child , which means that the child will not carry any of their genes 盡管這種技術已經取得了很大進展,但是對于那些沒有卵巢的婦女和睪丸發育不良或已切去睪丸的男子來說,如果他們想要孩子的話,就必須接受捐獻者的配子,這意味著這樣的孩子將不會攜帶任何他們的基因。

In addition , it has been found that the number of attached spores on the surface of ionic hydrogels was affacted by the crosslinking density of gels , but the germination ratio of attached spores and growth of gametes have nothing to do with the crosslinking density of gels 此外,離子型凝膠表面孢子的附著量受凝膠的交聯度影響,而孢子的萌發率以及配子體的生長發育均與凝膠的交聯度無關。

The gametophyte ( pollen grain ) contains all the genetic information required to unite with the female gamete at fertilization and to form a new sporephyte . a relatively large number of genes are required to program pollen development 在高等植物中,花的發育是一個復雜的過程,涉及到由營養分生組織(或花序分生組織)向花分生組織的轉變,花的形態建成以及雌、雄配子體的發育和分化。

This means changing the genome of either a gamete ( sperm or egg ) or a zygote ( a single cell formed either by fertilisation or by somatic cell nuclear transfer , a . k . a . cloning ) so that people are born with a designed genetic alteration 這意味著改變配子(精子或卵子)或合子(由受精或體細胞核移植形成的一個細胞,核移植也稱克隆) ,以至于人是由一種設計了的遺傳變化而出生。

They may only check with the hfea that they are not related to someone they intend to marry or ask the hfea presumably they have to be , firstly , suspicious if they were the product of donated gametes or embryos when they reach 18 他們只能通過hfea證實自己和結婚對象沒有血緣關系如果他們懷疑自己是捐獻配子或胚胎的產物,他們在18歲后也可向hfea查詢。

Characters controlled by the dna of extranuclear organelles are not inherited according to mendelian laws and are transmitted only through the female line , since only the female gametes have an appreciable amount of cytoplasm 由于細胞質大多來自母體所產生的配子,所以由細胞核外的細胞器的dna所控制的遺傳性狀一般只隨母系而遺傳,也不符合孟德爾定律。

In organisms showing alternation of generations , the gametes may be produced by mitosis in the haploid generation , or by meiosis in the diploid generation and give rise directly to gametes or gamete - producing cells 在表現出明顯世代交替的生物體中,配子可能是由單倍體世代發生有絲分裂產生,亦可由二倍體世代減數分裂直接產生配子體或配子母細胞。

The endosperm is usually triploid and develops from the primary endosperm nucleus , the triploid nucleus resulting from the fusion of one of the male gametes from the pollen tube with the polar nuclei in the embryo sac 胚乳通常是三倍體,由初生胚乳核發育而來,三倍體核來源于花粉管中的雄配子與胚囊中兩個極核的融合。

In an era of changing laws about the rights of gamete donors , this opens their relationship to possible intervention by the sperm donor if he decides he wants to play a role in raising the child 在目前修改了配子捐獻者權利的法律這樣一個時代,如果他也想參與撫養孩子的話,那么她們的關系就可能受到干擾。

Almost 18 , 000 babies have been born through donated gametes sperm and eggs and embryos in the uk since the regulatory human fertilisation and embryology authority was set up in 1991 自從人工授精和胚胎學管理局hfea于1991年成立后,英國大約有1 . 8萬嬰兒通過捐獻的配子精子卵子和胚胎孕育出生的。

Between 1940 and 1990 , tens of thousands more were conceived mainly using donated sperm , the low - tech end of gamete donation which has been around for over a century 從1940年至1990年,又有數萬名嬰兒主要通過捐獻配子出生,其中大多數是通過捐獻者的精液人工授精的:這是較低級的配子捐獻技術。

It is due to the lack of homologous pairs of chromosomes , so chromosomes cannot pair in meiosis , and the resulting gametes may have extra or missing chromosomes 這歸因于染色體同系對的缺乏,以至于在減數分裂中染色體不能配對,導致配子有可能有額外或缺失染色體。

Segregation the separation of the two alleles of a gene into different gametes , brought about by the separation of homologous chromosomes at anaphase 1 of meiosis 分離:同源染色體在細胞減數分裂后期中向細胞極遷移,使等位基因最終分向不同配子。

External fertilization occurs when gametes are expelled into a watery substrate from the parental bodies before fusion ; it is typical of sporebearing plants 當配子在融合之前從親本體中排出到有水介質時發生體外受精,這是孢子植物的特征。

The haploid plant produces gametes mitotically and is thus termed the gametophytes while the diploid plant produces spores meiotically and is called the sporophyte 單倍體植物有絲分裂產生配子體,二倍體減數分裂產生孢子體。

Karyogamy the fusion of two nuclei that exist within a common cytoplasm , as occurs in the formation of the zygote from two gametes 核配:同一個細胞中兩個核之間的融合現象稱為核配,核配發生在兩個配子結合成合子的過程中。

The gametes fuse to form a zygote , which develops into the sporophyte , and the spores germinate and produce the gametophyte , so forming a cycle 配子融合產生合子,進而發育為孢子體,孢子萌發產生配子體,形成一個循環。