Cell Cycle, Mitosis, and Meiosis
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21 terms
Terms | Definitions |
|---|---|
 Haploid | Cell that contains a single set of chromosomes - sex cells (23 Chromosomes) |
| Diploid | Cell that contains both sets of homologous chromosomes- hair, skin, liver, brain (46 chromosomes) |
| Crossing Over | process in which homologus chromosomes exchange portions of their chromatids during meiosis. |
| Homologous Pair | chromosomes that each have a corresponding chromosome from the opposite-sex parent |
| Metaphase I | The chromosomes line up DOUBLE FILE in the middle of the cell. |
| Prophase I | -DNA condenses from chromatin-chromosomes -Chromosome pairs with its corresponding chromosome to form a tetrad. |
| Anaphase I | Sister chromatids DO NOT seperate Chromosomes move to the poles |
| Telophase I | The chromosomes DO NOT unwind back into chromatin The cell separates into two cells |
| Interphase I | The cell grows, DNA is replicated, centrioles are replicated |
| Meiosis II | The two cells produced by meiosis I enter a second meiotic division |
| Interphase II | DNA does not replicate Occurs between meiosis 1 and meiosis 2 |
| Prophase II | Centrioles move to the poles and create the spindle Nuclear membrance and nucleolus disapear DNA is already in chromosome form |
| Metaphase II | The chromosomes line up single file |
| Anaphase II | The centromere of each chromosomes disappears and the sister chromatids separate- one chromatid goes to one pole and to the other |
| Telophase II | Chromosomes unwind back into chromatin Nuclear membrane and nucleolus reform Cytokinesis occurs Ends up with 4 haploid cells (23 chromosomes) |
| Cell Cycle | An ordered set of events resulting in cell growth and division of one cell into 2 daughter cells |
| Interphase | The cell grows in size and doubles its content by copying its chromosomes |
| G1 | Cell grows and prepares for s phase |
| S-phase | Phase where chromosomes replicate |
| G2 | Cell makes final preparations for division Centrioles are replicated |
| Mphase | Cell divides |
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