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Three cell cycle stages included in Interphase
- G1
- S
- G2
Two processes that occur during M-phase
- Mitosis
- Cytokinesis
5 Major phases of Mitosis
1. Prophase
2. Prometaphase
3. Metaphase
4. Anaphase
5. Telophase
Prometaphase – the nuclear envelope breaks down and chromosomes attach to spindle
microtubules
Metaphase – chromosomes align at the spindle equator
Anaphase – sister chromatids separate and move to opposite poles
Telophase – the nuclear envelope reassemble and the contractile ring is visable
Major difference between Mitosis and Meiosis
Mitosis
Starting cell type
Somatic
Starting cell (diploid or haploid)
diploid
Cells types generated
Somatic
Number of cells generated
two
Genetic constancy or diversity
Genetic constancy
Meiosis
germ cells
diploid
Gamates (egg/sperm)
four
Genetic Diversity
Best describes the chromosomes that are lined up at the spindle equator during metaphase of
Meiosis 1
- Two pairs of sister chromatids
- Pairs of replicated homologous chromosomes double file
Three types of microtubules involved in cell divison
- Kinticore microtubules
- Aster
- Interpolar