University:
Sam Houston State University
Course:
BIOL 2413 | General Zoology
Academic year:

2022
Views:

394

Pages:

9
Author:

Giselle A.

E – Moment Crayon Moment Plant and Animal Cells in Prophase  Plant & animal cells in prophase Plant and Animal Cells in Metaphase Plant and Animal Cells in Anaphase Plant and Animal Cells in Telophase Plant and Animal Cells in Cytokenisis Control of Cell Cycle There are three checkpoints: 1) G1 Checkpoint a. Decides when a cell can divide based on environmental conditions, health and cell size b. Favorable conditions begin S phase If not favorable, a resting period begins Control of Cell Cycle 2) G2 Checkpoint a) DNA repairs enzymes and checks DNA replication b) Once this checkpoint is passed, then mitosis begins 3)Mitosis Checkpoint a) Signals end of mitosis and G1 begins again Control of Cell Cycle What happens when checkpoints fail? 1. Cancer can occur Cancer is the uncontrolled growth of cells. 2. Mutation missed by checkpoint can cause overproduction of growth hormone 3. Damage done to a cell by environmental factors can cause cells to constantly repair