NounSingular gametogenesis Plural uncountable gametogenesis (uncountable)
SynonymsRelated termsFrom Wiktionary under the GNU Free Documentation License. Gametogenesis is a process by which diploid or haploid precursor cells undergo cell division and differentiation to form mature haploid gametes. Depending on the biological life cycle of the organism, gametogenesis occurs by meiotic division of diploid gametocytes into various gametes or by mitotic division of haploid gametogenous cells. For example, plants produce gametes through mitosis in gametophytes. The gametophytes grow from haploid spores after sporic meiosis. The existence of a multicellular, haploid phase in the life cycle between meiosis and gametogenesis is also referred to as alternation of generations. Gametogenesis in animalsScheme showing analogies in the process of maturation of the ovum and the development of the spermatids, following their individual pathways. The oocytes and spermatocytes are both gametocytes. Ova and spermatids are complete gametes.Animals produce gametes directly through meiosis in organs called gonads. Males and females of a species that reproduces sexually have different forms of gametogenesis:
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GNU Free Documentation License What factors influence gametogenesis? Q. (This is not homework...) I think it's probably hormones, temperature, drugs, etc. But I don't know the details. Can anybody help me? Asked by Kunisaki S - Tue Jan 2 04:16:14 2007 - - 3 Answers - 0 Comments A. Major factors that influence gametogenesis include hormones, or rather, the coordination of different hormones in the body, especially the sex hormones. In males, testosterone is the key sex hormone. It is primarily for gametogenesis (sperm) and works hand-in-hand with the androgen binding factor (ABF), which is responsible for concentrating testosterone to where the sperm are produced, thereby nourishing them for development. There is also the follicle-stimulating hormone, which can also initiate spermatogenesis. Temperature plays a very major role in spermatogenesis. Sperm cannot be produced at body temperature. This is why males have a scrotum so that the testes could lie outside the main body by descending outward onto the pouch-like… [cont.] Answered by bl00ish - Tue Jan 2 12:50:24 2007 what is gametogenesis? Q. what is gametogenesis? Asked by Juna - Thu Feb 15 21:05:37 2007 - - 1 Answers - 0 Comments A. gameto- refers to gametes (eggs, sperms, ...) genesis means the beginning or birth of something (in this case, making something) So gametogenesis means the process of making gametes. Answered by ecolink - Thu Feb 15 21:09:13 2007 which process restores the diploid chromosome number of the species for the next generation?
Q. After gametogenesis takes place, which process restores the diploid chromosome number of the species for the next generation? 1. oogenesis 2. mitosis 3. fertilization 4. meiosis Asked by mrs.urie - Sun May 17 17:41:09 2009 - - 2 Answers - 0 Comments From Yahoo Answer Search: "gametogenesis"  genengnews.com Thu, 10 Jun 2010 14:39:15 GMT+00:00 Genetic Engineering News They additionally found that p53 activation during gametogenesis has been conserved throughout evolution. Similar activations during the formation of ...  sciencemag.org Thu, 03 Jun 2010 18:10:22 GMT+00:00 Science Magazine (subscription) Therefore, the gene does not exert essential functions needed for gametogenesis or proper chromosome segregation (table S2). ... From Google News Search: "gametogenesis"  umanitoba.ca 672px x 500px | 63.00kB [source page] Gametogenesis in plants Microsporogenesis FIGURE 10 produces pollen grains diploid mother cell microsporocyte undergoes meiosis to produce 4 microspores From Yahoo Image Search: "gametogenesis"  plosone.org Lisa R. Meeks et al. hu, 26 Nov 2009 08:00:00 GM Together, these results indicate that all four Arabidopsis poly(A) polymerase genes are essential for some aspect of growth and development, and implicate one poly(A) polymerase gene (encoded by At3g06560) in . gametogenesis. . ...  askdrshihaan.org Dr Shihaan Sun, 23 Nov 2008 02:38:55 GM disruption of meiosis during . gametogenesis. may result in the formation of chromosomally abnormal gametes. eg nondisjunction which can lead to a numerical chromosomal abnormality such as in down's syndrome. ...  alejandromed.wordpress.com alejandromed hu, 14 Jan 2010 14:38:40 GM Gametogenesis. . Por alejandromed. anomalias congenitas y diagnostico prenatal. Los terminos utilizados para describir el estudio de anomalias, malformaciones o defectos congenitos son teratologia y dismorfologia. ... From Google Blog Search: "gametogenesis" |
