egg activation

См. также в других словарях:

• Egg activation — After the fusion of the sperm plasma membrane and the egg plasma membrane after fertilization, animal eggs go through a process called egg activation to prepare the egg for development.There are three functions of egg activation: # Block to… …   Wikipedia

• activation — (of egg) Normally brought about by contact between spermatozoon and egg membrane. Activation is the first stage in development and occurs independently of nuclear fusion. The first observable change is usually the cortical reaction that may… …   Dictionary of molecular biology

• Oocyte activation — Oocyte (or ovum/egg) activation is a series of processes that occur in the oocyte after fertilisation. Sperm entry causes calcium release into the oocyte. In mammals, this has been proposed to be caused by the introduction of phospholipase C… …   Wikipedia

• Ovum activation — is the events which occur after fertilisation.Sperm entry causes calcium release into the oocyte. This is caused by the presence of PLCzeta from the sperm cytoplasm. Activation of the ovum causes the following events:*Cortical… …   Wikipedia

• fertilization — fertilizational, adj. /ferr tl euh zay sheuhn/, n. 1. an act, process, or instance of fertilizing. 2. the state of being fertilized. 3. Biol. a. the union of male and female gametic nuclei. b. fecundation or impregnation of animals or plants. 4.… …   Universalium

• Maternal to zygotic transition — (MZT) is the stage in embryonic development during which development comes under the exclusive control of the zygotic genome. This requires both zygotic genome activation (ZGA) and degradation of maternal products. MZT is often thought to be… …   Wikipedia

• Polyadenylation — Typical structure of a mature eukaryotic mRNA Polyadenylation is the addition of a poly(A) tail to an RNA molecule. The poly(A) tail consists of multiple adenosine monophosphates; in other words, it is a stretch of RNA that has only adenine bases …   Wikipedia

• Vitelline membrane — Infobox Embryology Name = Vitelline membrane Latin = m. vitellina GraySubject = 5 GrayPage = 45 Caption = Caption2 = System = CarnegieStage = Days = Precursor = GivesRiseTo = MeshName = Vitelline+membrane MeshNumber = A16.631.886 DorlandsPre = m… …   Wikipedia

• David Epel — is a researcher at Hopkins Marine Station in Pacific Grove, California. Contents 1 Biography 2 Research Focus 3 Scientific Lineage 4 External links …   Wikipedia

• Яйца активация — * яйца актывацыя * egg activation стимуляция начала делений дробления яйцеклетки после ее оплодотворения и соединения гаплоидных ядер …   Генетика. Энциклопедический словарь

• gynogenesis — Egg development activated by a spermatozoon, but to which the male gamete contributes no genetic material. [gyno + G. genesis, production] * * * gy·no·gen·e·sis jen ə səs n, pl e·ses .sēz develo …   Medical dictionary