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Bio5 AP Review
Cell Division
| Question | Answer |
|---|---|
| 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. |