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Transcript
Mitosis
***DRAW ALL PICTURES***
The Cell Cycle
During the cell cycle, a cell grows,
prepares for division, and divides to form
two daughter cells, each of which begins
the cycle again.
Consists of four stages:
G1
S
G2
Mitosis
Cell Division and Definitions
Before cell division begins, each cell must
copy its DNA so that each daughter cell
gets a complete copy of the genetic
information.
Mitosis: division of cell nucleus
Cytokinesis: division of cytoplasm
Chromosomes carry genetic information;
made of DNA
Not visible in most cells until cell division
Mitosis
Occurs in ALL eukaryotic cells except sex
cells
Broken down into the following stages:
Interphase
Prophase
Metaphase
Anaphase
Telophase
Interphase
G1: growth phase
S: chromosomes replicate
G2: growth phase
Prophase
Chromatin condenses into chromosomes
Centrioles separate and a spindle begins
to form
Nuclear envelope breaks down
Metaphase
Chromosomes line up across the center of
the cell
Each chromosome is connected to a
spindle fiber at its centromere
Anaphase
Sister chromatids separate into individual
chromosomes and are moved apart.
Telophase
Chromosomes gather at opposite ends of
the cell and lose their distinct shapes
2 nuclear envelopes form
Cytokinesis
The cytoplasm pinches in half
Each daughter cell has an identical set of
duplicate chromosomes.
Animal cell pinches.
Plant cell has a cell plate form between
the two.