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Oogenesis


oogenesis
formation of an egg and its preparation for fertilization and development
Source: Noland, George B. 1983. General Biology, 11th Edition. St. Louis, MO. C. V. Mosby ...
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Oogenesis
[Gr. oon - an egg; Gr. genesis - origin, descent] The process in females whereby a mature ovum is formed from an oocyte.
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Oogenesis occurs in the ovary.
Each of the divisions in humans is unequal. During the first meiotic division, a large secondary oocyte and a small polar body are produced. The secondary oocyte will divide to produce an egg and a polar body.
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oogenesis
(oo-oh-jen-eh-sis)
The process in the ovary that results in the production of female gametes.
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oogenesis The production of ova. The development of a diploid cell into a haploid ovum or egg cell. PICTURE ...
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Oogenesis
Egg formation takes place in the ovaries.
In contrast to males, the initial steps in egg production occur prior to birth. Diploid stem cells called oogonia divide by mitosis to produce more oogonia and primary oocytes.
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oogenesis The process by which an egg cell forms from an oocyte.
oogenotop Female genital complex of a flatworm, including oviduct, ootype, Mehlis' glands, common vitelline duct, and upper uterus.
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oogenesis
The process in the ovary that results in the production of female gametes.
Covered in Lab 14 Gametogenesis and Development ...
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1972: Oogenesis in Xenopus Iaevis (Daudin): Stages of Oocyte Development in Laboratory Maintained Animals by J. Dumont, J. Morph.136:153. A "Citation Classic" cited over 1130 times. (ORNL).
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During oogenesis, cytoplasmic bridges called "ring canals" connect the forming oocyte to nurse cells. Nutrients and developmental control molecules move from the nurse cells into the oocyte.
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EGFR transmembrane receptor- tk - EGF-R homology - during oogenesis helps set up egg polarity, determines the identity of cells in the ectoderm; during larval stages participates in the development of the eye and wing.
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Lampbrush chromosomes occur in a limited phase of meiosis during oogenesis in amphibian oocytes.
The lampbrush chromosome is a bivalent (2 pairs of sister chromatids held together by chiasmata).
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cells develop initially from germ stem cells known as spermatogonia . As these differentiate they become spermatocytes, spermatids (after meiosis) and then finally the fully mature spermatozoa. The female counterpart to spermatogenesis is oogenesis.
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