BIO 121 Lecture Notes - Lecture 6: Sister Chromatids, G2 Phase, Cell Cycle

• School: Cal Poly Pomona
• Department: Biology
• Course: BIO 121
• Professor: Brandon King

Document Summary

Then, the cell grows larger and one copy of the parent cell each is on both sides. Replication finishes, and 2 daughter cells are produced. Eukaryote cells divide by mitosis and meiosis. Mitosis: normal cell div, creates 2 cells identical to the parent. Meiosis: special cell div, creates haploid gametes. Starts with the g1 phase: 1st growth phase. S phase: 2nd phase, synthesis phase: cell replicates its dna (chromosomes) Centromere: center of the chromosome, holds sister chromatids together. Mitotic phase: phase of actual cell divison. Cell cycle control system: directs the events of a cell cycle regulated by both internal and external controls . The clock has specific checkpoints where the cell cycle stops until a go ahead signal is received. Gi: checks if its ok for the cell to start cell div. G2: bars entry into the mitotic phase.