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Mitosis/Meiosis
Biol 104
| Question | Answer |
|---|---|
| karyotype | a particular array of chromosomes of an organism |
| G1 | the time in which the cell cycle where the cell grows and does all of its normal activities |
| S | cell cycle stage when DNA is replicated |
| centromere | location on chromosome, in the center |
| kinetochore | section on centromere, binds to the spindle fiber |
| Prophase (Mitosis) | Chromatin changes into chromosomes, nucleus breaks down, spindle fibers form, centrioles move to the pole |
| Metaphase (mitosis) | microtubules pull the chromosomes to the center of the cell, they form in a line (metaphase/equatorial plate) |
| Anaphase (mitosis) | cohesion proteins are removed causing the centromeres to separate (separate chromatids), chromatids are pulled towards the poles |
| Telophase (mitosis) | nuclear membrane forms around chromosomes, chromosomes begin to uncoil |
| cytokinesis in animal cells | creates a cleavage furrow, a band that pinches the cell and causes it to split |
| cytokinesis in plant cells | forms a cell plate that splits the cell |
| crossing over | genetic recombination between sister chromatids |
| Prophase I (meiosis) | homologues become closely attached in synapsis (they pair up), crossing over occurs between nonsister chromatids |