Download presentation
Presentation is loading. Please wait.
Published byJosephine Banks Modified over 9 years ago
1
Mitosis and Cytokinesis Chapter 6.3
2
The Cell Cycle The Cell Cycle is a repeating sequence of cellular growth & division during the life of an organism.
3
Pre Mitosis- Interphase Phase of cell division when the cell copies its DNA grows larger & prepares to divide. A cell spends 90% of its lifetime in Interphase There are 3 sections of Interphase: G 1, S, and G 2
4
Interphase- G 1 Phase “G 1 ” Phase= First Growth phase 90% of the cells life is spent in the G 1 phase\ Carries out routine functions, grows Some muscle and nerve cells never leave this stage… what does this mean?
5
Interphase- “S” phase “S” phase = Synthesis Phase DNA is copied
6
Interphase- G2 Phase “G 2 ” Phase= 2 nd Growth Phase Microtubules form to prepare for division Microtubules- Hollow protein fibers that help pull chromosomes apart
7
Mitosis! Mitosis- Process of cell division where the nucleus divides Occurs in 4 Steps Prophase Metaphase Anaphase Telophase
8
Mitosis Stage 1- Prophase Nucleus Breaks Down Spindle Forms to pull microtubules Chromosomes are visible
9
Mitosis Stage 2- Metaphase Chromosomes line up at the equator
10
Mitosis Stage 3- Anaphase Chromosomes split Chromosomes are pulled to opposite sides of the cell
11
Mitosis Stage 4- Telophase The Nucleus reappears The cell begins to split
12
Post Mitosis- Cytokinesis The cell splits into two cells by: Cleavage Furrow- occurs in animal cells/ cells without cell walls Cell Plate Formation- occurs in plant cells/ cells with cell walls
13
IMPORTANT !!!!!!!!! Interphase and Cytokinesis are NOT considered Mitosis! MITOSIS is ONLY… PROPHASE METAPHASE ANAPHASE TELOPHASE
Similar presentations
© 2024 SlidePlayer.com. Inc.
All rights reserved.