Biology 2382B Lecture Notes - Lecture 7: G1 Phase, Wild Type, Metaphase
Document Summary
The cell cycle is the essential mechanism by which all living things reproduce and pass on genetic information to the next generation of cells. It is a process that ensures dna in each chromosome is faithfully replicated to produce 2 copies and that replicated chromosomes be accurately distributed (segregated) to 2 genetically identical daughter cells. The cell cycle is also involved in coordinating growth (increasing cell mass) in preparation for division. At the end of the s phase, cells enter g2 containing twice the number of chromosomes as g1 cells. The end of g2 is marked by the onset of mitosis, during which numerous events leading to cell division occur. The g1, s, and g2 phases are collectively referred to as interphase, the period between one mitosis and the next. Most non-proliferating cells in vertebrates leave the cell cycle in g1, where most cells arrest in the g0 state. G1 phase is by far the longest for most cells, while.