Oogenesis proceeds as a primary oocyte undergoes the first cell division of meiosis to form secondary oocytes with the haploid number of chromosomes. Over the next few months, oogonia undergo mitosis, forming cells called primary oocytes. Primary oocytes are also diploid cells.Click to see full answer. In this regard, what is a primary oocyte?Primary oocyte. From Biology-Online Dictionary | Biology-Online Dictionary. Definition. noun, plural: primary oocytes. The oocyte that arises from the oogonium via the process of oocytogenesis, and gives rise to secondary oocyte and polar body after first meiotic division (meiosis I).Secondly, how many chromosomes are in an oocyte? 46 Also question is, what stage is oocyte at fertilization? Formation Cell type ploidy/chromosomes Time of completion Oogonium diploid/46(2N) third trimester primary Oocyte diploid/46(2N) Dictyate in prophase I for up to 50 years secondary Oocyte haploid/23(1N) Halted in metaphase II until fertilization Ootid haploid/23(1N) Minutes after fertilization How does an oocyte become an ovum?In the fallopian tube, if pregnancy occurs, the ootid is fertilized by a sperm cell. Once this fertilization takes place, the ootid goes through its final stage of maturation and becomes an ovum, a fully mature human egg cell. That’s right; the oocyte actually can’t complete its full development without fertilization.
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