Playlist

Cell Division: Meiosis (Nursing)

by Jasmine Clark

My Notes
  • Required.
Save Cancel
    Learning Material 2
    • PDF
      Slides Nursing Physiology Cell Structure of the Human Body.pdf
    • PDF
      Download Lecture Overview
    Report mistake
    Transcript

    00:01 So speaking of babies, when it comes to reproductive cell division, we're going to do things a little differently.

    00:08 And the reason why is because we actually want a different result than that of mitosis.

    00:14 So in reproductive cell division, our reproductive cells or the sperm cells in male or the oocytes cells in females are going to undergo a division so they end up with half the number of chromosomes than what they started with.

    00:30 So what do I mean by that? Remember in all of your cells, you have two sets of 23 chromosomes for a total of 46 chromosomes.

    00:41 So let's think about it in terms of shoes.

    00:44 So you have a right shoe and a left shoe, but they are a pair of shoes.

    00:50 That's how your chromosomes are.

    00:52 You have one chromosome from your mom and one chromosome from your dad and together, they make a set of chromosomes.

    01:00 So remember in S phase, we duplicated all of our chromosomes so now, they are held together in an x-like form and we we refer to them as sister chromatids.

    01:12 In the first part of meiosis or meiosis I, what I'm going to do is separate the two shoes so I'm going to put the left shoe in one cell and the right shoe in another cell.

    01:25 They're still duplicated or in the 'sister chromatid form' but they are now in separate cells.

    01:32 This is referred to as going from diploid to haploid.

    01:38 Now in meiosis II, my haploid cells still contain the sister chromatids or the Xs where the two duplicated chromosomes are now in the same cell, and I need to separate those two duplicated chromosome and to individual chromosomes in each cell.

    01:59 So at the end of meiosis II, you started with one cell and you end up with four separate cells each with half the number of chromosomes that you started with.

    02:11 And now for reproduction to occur, we allow one cell to fuse with another and now we have two sets again.p


    About the Lecture

    The lecture Cell Division: Meiosis (Nursing) by Jasmine Clark is from the course Cell Structure of the Human Body – Physiology (Nursing).


    Included Quiz Questions

    1. Gametes such as sperm cells and oocytes
    2. Two daughter cells identical to the parent cells
    3. Four daughter cells identical to the parent cells
    4. Stem cells such as embryonic or pluripotent cells
    1. Growth factors
    2. Dense or crowded cells
    3. Lack of anchorage
    4. Nutritional deficits
    5. Chemical exposure

    Author of lecture Cell Division: Meiosis (Nursing)

     Jasmine Clark

    Jasmine Clark


    Customer reviews

    (1)
    5,0 of 5 stars
    5 Stars
    5
    4 Stars
    0
    3 Stars
    0
    2 Stars
    0
    1  Star
    0