University:
Sam Houston State University
Course:
BIOL 1406 | General Biology I
Academic year:

2023
Views:

367

Pages:

11
Author:

Clint W.

Mitosis & Meiosis Objectives    Define mitosis. Define meiosis. Analyze function of mitosis and meiosis in cell differentiation. Mitosis:     If a cell wants to make a duplicate of itself, it first must copy its DNA (part of a chromosome). The copies then must be separated & sorted into two sides of the cell. The cell then splits in two. Part of each parent is carried to the two new cells. Results in cells such as internal organs, skin, bones, blood, etc. Meiosis:  As in mitosis, if a cell wants to make a duplicate of itself, it first must copy its DNA (part of a chromosome).  Results in reproductive cells (sperm, eggs, etc).  Part of each parent is carried to the four new cells.  Meiosis has evolved to solve a problem.   The problem is this: some organisms mate with other organisms – that is, they combine their genes together (creating genetic diversity). Why would this be a problem? Use this to remember these terms:  MITosis takes the cell and Makes It Two (diploid)  Meiosis has to do with sexual reproduction  From the cell’s point of view:  mITosis results in Identical Twins  mEioSis results in Egg and Sperm (haploid) Mitosis: Meiosis: Vocabulary   Diploid Haploid       Interphase Prophase Metaphase Anaphase Telophase Cytokinesis Interphase occurs just before Mitosis begins: DNA is replicated along with organelles and other cellular components and the cell prepares for division. Mitosis Interphase Animal cell Plant cell st 1 step in Mitosis: Prophase (preparation phase) The DNA recoils, and the chromosomes condense; the nuclear membrane disappears, and the mitotic spindles begin to form. Mitosis Prophase Animal cell Plant cell