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Bio5 AP Review

Cell Division

Cytokinesis Division of Cell into two cells. Happens after Mitosis
Sister Chromatids Two identical halves of a chromosome
Centromere The center part that binds the two chromatids together
Human DNA Amount 46 Chromosomes, 23 Homologous Pairs, 92 Chromatids
interphase the time when the cell is not dividing
nucleolus this produces the ribosome components and is located inside the nucleus
Centrosomes also called microtubule organizing centers (MTOCs) they contain centrioles which create the mitotic spindle
Prophase I Nucleoli disappear, Chromatin to Chromosomes, nuclear envelope breaks down, mitotic spindle is created homologous chromosomes pair in tetrads and exchange genes.
Metaphase I the mitotic spindle attaches to the chromosomes one from each side per tetrad
Anaphase I the tetrads uncouple and the homologous chromosomes are pulled to opposite sides
Telophase I a nuclear membrane is created around each pole which creates a haploid nucleus with full chromosomes. Then cytokinesis often occurs.
Prophase II the nuclear envelope disappears and spindle fibers develope
metaphase II chromosomes align on metaphase plate
anaphase II the chromosomes are pulled apart into chromatids and go to the poles
telophase II nuclear envelopes reappear at each pole and cytokinesis occurs.
Created by: samft98c