Review of Gamete Formation (Nursing)

by Jasmine Clark, PhD

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    00:01 Welcome! In this lecture we will be discussing the physiology of the female reproductive system.

    00:10 So before we talk specifically about the female reproductive physiology, recall that gamete formation in the female reproductive system is going to involve the formation of haploid cells.

    00:25 So in our body, most of our body cells or somatic cells have 46 chromosomes.

    00:33 We have two sets of 23 pairs of chromosomes.

    00:37 Where one is the maternal chromosome and the other is the paternal chromosome.

    00:43 Together we call this pair of homologous pairs or homologous chromosomes.

    00:50 46 is referred to as are diploid chromosomal number and sometimes is going to be annotated as 2N.

    01:01 In our gametes cells we only have 23 or half the number of chromosomes.

    01:07 This is are haploid chromosome number or n.

    01:12 This is because only one member of the homologous pairs are going to find themselves in these gametes cells.

    01:20 So formation of these haploid cells requires a process known as meiosis.

    01:27 Let's do a quick recap of mitosis and meiosis.

    01:31 So in mitosis, we're going to start with our 46 chromosomes and which all 46 will line up along the midline of the cell during metaphase.

    01:43 At the end of mitosis, we will end up with two daughter cells that are diploid and genetically identical to the mother cell.

    01:53 In meiosis, however, we're going to have two cell divisions.

    01:58 In the first cell division, we're going to separate the homologous pairs from each other and in the second cell division, we're going to separate the sister chromatids.

    02:10 At the end of meiosis, we end up with four daughter cells that each contain one of those chromosomes in the homologous pair.

    About the Lecture

    The lecture Review of Gamete Formation (Nursing) by Jasmine Clark, PhD is from the course Female Reproductive System – Physiology (Nursing).

    Included Quiz Questions

    1. Oogenesis
    2. Gametogenesis
    3. Spermatogenesis
    4. Ovariogenesis

    Author of lecture Review of Gamete Formation (Nursing)

     Jasmine Clark, PhD

    Jasmine Clark, PhD

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