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Biology: Oogenesis: Meiosis in Females

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    In this lesson, Professor Wolfe reviews meiosis in the female system. In meiosis, a somatic cell (2n) goes through two splits to become gametes. Gametes are generated in organs called gonads. Meiosis is the division of a diploid cell to form a haploid cell called a gamete. Meiosis in a female is referred to specifically as oogenesis. It takes place in the ovaries of a female human. He will walk through the steps of female meiosis, including both Meiosis I (which creates secondary oocytes and polar bodies, which are degenerative and non-functional) and Meiosis II (a process that only occurs at fertillization in the production of offspring). If fertilization occurs (and a zygote or fertilized egg is created), Meiosis II happens and in that second division, a secondary oocyte is divided into a second polar body and an ovum. The ovum (n) will have half of the number of chromosomes as the oogonium (2n).

    He also highlights the main differences between female and male meiosis processes (differences between oogenesis and spermatogenesis) as well as the explanation for why polar bodies are created in oogenesis.





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