We think you have liked this presentation. If you wish to download it, please recommend it to your friends in any social system. Share buttons are a little bit lower. Thank you!
Presentation is loading. Please wait.
Published byAisha Cressey
Modified over 6 years ago
Cell Growth and Division
Cell Growth Living things grow chiefly because of two things. 1. The number of cells increases.
2. The size of each individual cell increases. Number 1 is actually due to number 2!
Volume vs. Area The volume, the growth of the internal parts of the cell surpasses that of the area, or external parts of the cell.
Limits The growth is limited by two things The instructions, DNA. The amount of available materials.
Cell division The point at which the internal exceeds the external = division. Parent Daughter 1 Daughter 2
Rate of growth In ideal conditions, E- coli can double its volume in just 30 minutes. In one day a single bacteria could produce a 14 Kg mass.
In three days the mass of the bacteria would equal that of the…
Disorderly growth Cancer: a disorder in which cells have lost the ability to control their rate of growth. P D1 D2 D3 D2 D3 D1 D2 D3 D2 D3
Cell Division There are two main stages to division of Eukaryotic cells. Mitosis Cytokinesis
Mitosis The nucleus of the parent cell is divided into 2. Each with the same number and type of chromosomes.
Cytokinesis The cytoplasm of the parent cell divides. Two distinct cells are formed. Daughter cells
Chromosomes Highly organized segments of genetic information. Made up of chromatin.
Chromatin A specific combination of DNA and proteins.
Chromatids Each chromosome has two identical parts, chromatids. Joined by a centromere.
The two identical parts allow for the production of two identical cells.
The process of cell growth and division is a cycle. Mitosis Cytokinesis Interphase
Mitosis Cytokinesis Interphase
The period between cell divisions 3 phases G1, S, and G2
1.G1: Cell growth 2.S: DNA replication 3.G2: Preparation for mitosis
Mitosis (4 phases) 1.Prophase 2.Metaphase 3.Anaphase 4.Telophase
Prophase(fig 8-12) Longest phase Centrioles take positions at opposite ends of the cell
Spindle fibers form between the centrioles Chromosomes attach to the spindle
The nucleolus disappears The nuclear envelope breaks down.
Metaphase(fig 8-14) Shortest phase Chromosomes line up along the center of the cell.
Anaphase (fig 8-15) Centromeres split Individual chromatids are pulled to opposite ends of the cell.
Telophase (fig 8-16) Final phase Chromatids uncoil to reveal a mass of chromatin.
Nuclear envelopes reform around the chromatin A nucleolus becomes visible for each daughter cell
Cytokinesis Animal Cells The cell membrane moves inward pinching the cytoplasm into two cells.
Each half contains a nucleus And all necessary organelles Plant Cells A cell plate forms dividing the cell in half
The cell plate evolves into a new cell wall for each cell.
Scientific Notation M X 10 n A.1.) 1.0 X 10 -8 cm A.2.) 1.0 X 10 10 cm B.1.) 0.000002 cm B.2.) 1,000,000 times greater
B-2.6 Summarize the characteristics of the cell cycle: interphase (called G1, S, G2); the phases of mitosis (called prophase, metaphase, anaphase, and.
Cell Cycle IPMATC.
The Cell Cycle.
10.2 The Process of Cell Division
1 Review What are chromosomes Compare and Contrast How does the structure of chromosomes differ in prokaryotes and eukaryotes 2 Review What happens during.
Unit 3 Part 2 – The Cell. PROKARYOTIC CELLSEUKARYOTIC CELLS No nucleus. No membrane bound organelles. (ex. mitochondria, vacuole, chloroplast) A.)
Section 10.2 (Pg ): The Process of Cell Division
Chapter 10.2 Cell Division.
The Cell Cycle and Cell Division
The Cell Cycle: Interphase, Mitosis and Cytokinesis
The Cell Cycle and Mitosis
How do cells grow & reproduce?. In the Beginning – One Cell Most of the organisms start out as one cell Humans start out as a single cell, the zygote,
Mitosis and the Cell Cycle Division of the nucleus and the nuclear material (DNA), as well as the cell.
What’s happening and where are things moving to?
Cell Cycle The repeating set of events in the life of a cell. The repeating set of events in the life of a cell. Includes Includes Interphase Interphase.
This cycle consists of three phases: G1, S, G2
© 2021 SlidePlayer.com Inc. All rights reserved.