- maturation divisions
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A series of nuclear divisions in the formation of the gametes in which the chromosome number, through meiosis is reduced from diploid to haploid.
Online Dictionary of Invertebrate Zoology. A.R. Maggenti and S.L. Gardne. 2005.
maturation divisions
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Maturation de l'ovocyte de Xénope — Xénope Xénope … Wikipédia en Français
Maturation d'affinité des immunoglobulines — La maturation d affinité est un processus spécifique de la réponse immunitaire adaptative conduisant à la production par les lymphocytes B d immunoglobulines d affinité croissante pour l antigène. Centre germinatif Sommaire … Wikipédia en Français
maturation zone — In males of many invertebrates, that part of the genital follicle below the germarium in which each spermatocyte undergoes the two meiotic divisions to produce spermatids; see transformation zones … Dictionary of invertebrate zoology
mat|u|ra|tion — «MACH u RAY shuhn», noun. 1. the process of growing and developing; ripening or maturing: »Figurative. the germination and maturation of some truth (Cardinal Newman). 2. Biology. a) the final stages in the preparation of germ cells for… … Useful english dictionary
monad — 1. A univalent element or radical. 2. A unicellular organism. 3. In meiosis, the single chromosome derived from a tetrad after the first and second maturation divisions. [G. monas, the number one, unity] * * * mo·nad … Medical dictionary
Деления созревания — * дзяленні выспявання * maturation divisions серия делений ядра, при которых количество хромосом уменьшается вдвое (см. ) и образуются зрелые сперматозоиды и яйцеклетки или споры … Генетика. Энциклопедический словарь
maturationdivision — maturation division n. Either of the two successive cell divisions of meiosis, with only one duplication of the chromosomes, that results in the formation of haploid gametes. * * * … Universalium
DÉVELOPPEMENT HUMAIN — Le verbe latin volvere (dans sa forme active faire rouler, faire avancer; dans sa forme neutre, tourner) a engendré voloper en vieux français. Dès le XIIe siècle, on oppose déjà envelopper (enrouler) et développer (dérouler). Au XVe siècle le… … Encyclopédie Universelle
angiosperm — /an jee euh sperrm /, n. Bot. a plant having its seeds enclosed in an ovary; a flowering plant. Cf. gymnosperm. [ANGIO + SPERM] * * * ▪ plant Introduction any member of the more than 300,000 species of flowering plants (division Anthophyta) … Universalium
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
