BIOL 2021 Lecture Notes - G0 Phase, Chromosome Segregation, Gene Duplication

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16 Oct 2011

Document Summary

All cells come from pre existing cells. Cell cycle = cycle of a cell growth and division. Replicate chromosomes and segregate to daughter cells. S phase and m phase are the most important. M phase: chromosome segregation and cell division (mitosis and cytokinesis) When cells are taking time for growing and monitoring environment to assess whether. Cells can have a g0 phase which is a resting phase. End of g1 there is a start phase. Irreversible (can"t go back, must continue in the cycle) Stages of mitosis -> pannel 17. 1: prophase. Nuclear membrane begins to breakdown in animal cells: metaphase, anaphase, telophase. Yeast mutants defective in genes for cell cycle. 3: start= enter cell cycle (point of no return) Is environment favourable: g2/m: entry into mitosis. Looks to see if dna synthesis is complete. Looks to see if environment is favourable: metaphase/anaphase transition. Many of the steps are controlled by cyclin dependant kinase (cdk)