- cleavage spindle
- any spindle formed during cleavage of the zygote.
Medical dictionary. 2011.
cleavage spindle
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cleavage spindle — cleavage spindle, Embryology. the karyokinetic spindle of a dividing blastomere, during the early development of the ovum … Useful english dictionary
Cleavage (embryo) — In embryology, cleavage is the division of cells in the early embryo. The zygotes of many species undergo rapid cell cycles with no significant growth, producing a cluster of cells the same size as the original zygote. The different cells derived … Wikipedia
spindle — In anatomy and pathology, any fusiform cell or structure. [A.S.] aortic s. a fusiform dilation of the aorta immediately beyond the isthmus. SYN: His s.. central s. a central group of microtubules (continuous fib … Medical dictionary
radial cleavage — a cleavage pattern characteristic of vertebrates and echinoderms, in which the spindle axes are parallel or at right angles to the polar axis of the zygote … Medical dictionary
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
sperm-aster — ˈ ̷ ̷ˌ ̷ ̷ ̷ ̷ noun : the centrosome and aster associated with the male pronucleus in the stage of fertilization preceding fusion of pronuclei and usually giving rise to the first cleavage spindle of the zygote … Useful english dictionary
Cytokinesis — A cell that has almost completed cytokinesis. An arrow points to a centrosome that can still be seen … Wikipedia
Mitosis — Not to be confused with meiosis, miosis, or myositis. Mitosis divides the chromosomes … Wikipedia
Katsuma Dan — nihongo|Katsuma Dan|團 勝磨|Dan Katsuma|October 16, 1905 May 18, 1996 was a Japanese embryologist and cell biologist. He was born in 1905, the youngest son of Baron Dan Takuma, president of the Mitsui Gomei Kaisha Corporation. Takuma Dan was… … Wikipedia
plant development — Introduction a multiphasic process in which two distinct forms succeed each other in alternating generations. One form, created by the union of sexual cells (gametes (gamete)), contains two sets of similar chromosomes (diploid). At sexual… … Universalium
