Why is cell division important? (what processes involve cell division?)

Why is cell division important? reproduction maintenance repair immune response growth development cancer

What are chromosomes made of? In order for the new cells to have all the same characteristics as the parent cell, what must be passed along to each of them? hereditary material - chromosomes What are chromosomes made of? genes (DNA), and protein

Chromosome

Cell Division - 2 major stages 1. mitosis – genetic material “divided” 2. cytokinesis - cytoplasm divides (these stages overlap each other)

Chromatin

Interphase time period between cell divisions chromatin replicated (replication of chromatin = replication of DNA = replication of chromosomes)

http://www.youtube.com/watch?v=dnGOHNMahew&feature=related http://www.youtube.com/watch?v=-G-3BDlnK58&feature=related http://www.youtube.com/watch?v=CdWn_qRToyw&feature=related http://anthro.palomar.edu/biobasis/videos/tdc02_vid_dnadivide.html http://www.youtube.com/watch?v=JHRBJgq50dk&NR=1 funny song and video corny

Double Stranded Chromosome

Chromatids Centromere

Spindle fibers

Mitosis Metaphase

Mitosis in an animal cell 6 - interphase 4 - anaphase 2 - prophase 3 - metaphase 5 - telophase 1 - interphase

Mitosis in a plant cell 6 - interphase 2 - prophase 4 - anaphase 5 - telophase 3 - metaphase 1- interphase

6 9 3 1 8 2 5 4 7

Eukaryotic Cell Division 2 major stages 1. mitosis - nucleus of cell divides forming 2 nuclei 2. cytokinesis - cytoplasm divides (these stages overlap each other)

Interphase time period between cell divisions chromatin replicated (replication of chromatin = replication of DNA = replication of chromosomes)

Prophase 1st stage of mitosis nuclear membrane disintegrates spindle forms chromosomes become visible (they form from coiling of chromatin)

Metaphase chromosomes line up in middle of cell chromosomes become attached to the spindle apparatus of centromeres

Anaphase centromeres replicate and separate spindle fibers shorten, spindle fibers pull the chromatids apart and collect them near the poles

Telophase new nuclear membrane forms chromosomes become long and thin cytoplasm begins to divide

Cytokinesis division of the cytoplasm of a cell after division of nucleus

When a cell is deprived of ATP, mitosis stops. What does this tell you about mitosis?

spindle fiber formation, chromosome movements, require ATP DNA replication, spindle fiber formation, chromosome movements, require ATP

The Cell Cycle

Can you name the stage of each photo of mitosis?

How is cell division different in plant and animal cells? Plant cells - no centrioles - cell membrane does not pinch in as in animal cells - form new cell wall (cell plate) between new cells