https://www.youtube.com/watch?v=Q6ucKWIIFmg stop at 4:26 https://www.youtube.com/watch?v=f-ldPgEfAHI

How does the cell know how to divide? Cell Division Reproduction Growth Repair Why do cells divide? How does the cell know how to divide? The DNA has the instructions for all of the cell’s activities.

Cell Cycle 3 Parts The sequence of development and division of a cell Interphase - Preparation Mitosis – Division of Nucleus Cytokinesis – Splitting Adult human cell: ~24 hrs 18-20 hours in interphase 2 hours in mitosis Embryonic cells: 30 min. How long does it take?

What is a chromosome? thread-like structures inside the nucleus of cells contains the specific instructions that make that organism Humans have 46 chromosomes

Interphase What happens Cell doubles in size DNA replicates Organelles double in number

Interphase Plant Cell Animal Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

Mitosis: PROPHASE What happens DNA forms chromosomes Spindle forms Centrioles move toward opposite poles Nuclear membrane begins to disappear

Prophase Plant Cell Animal Cell Spindle fibers Centrioles Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

Mitosis: METAPHASE What happens Nucleus has disappeared completely Chromosomes line up in the middle of the cell “equator”

Metaphase Plant Cell Animal Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

Mitosis: ANAPHASE What happens Centromeres divide Chromatids separate and move to opposite poles

Anaphase Plant Cell Animal Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

Mitosis: TELOPHASE What happens Nuclear membrane forms around each group of chromosomes Chromosomes unwind Cytokinesis begins

Telophase Plant Cell Animal Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

Cytokinesis Cytoplasm divides One cell becomes 2 cells What happens

Animal Mitosis -- Review Interphase                                                              Prophase                                                              Metaphase                                                              Anaphase                                                              Telophase                                                              Cytokinesis                                                             

Plant Mitosis -- Review Interphase                                                              Prophase                                                              Metaphase                                                              Anaphase                                                              Telophase                                                              Cytokinesis                                                             

Cell Cycle

1. http://www. youtube. com/watch 1.http://www.youtube.com/watch?v=VGV3fv-uZYI  stages of mitosis http://www.youtube.com/watch?v=m73i1Zk8EA0  mitosis in real time  2.   http://www.cellsalive.com/mitosis.htm https://www.youtube.com/watch?v=ofjyw7ARP1c 3.  Hand jive video  http://www.youtube.com/watch?v=-PMXatafIXc