Download Cell Reproduction

 How

do you grow?
By cells dividing
 What


happens when you fall on pavement?
You scrapped your skin off
New skin grows and replaces the old
 New
cells are made to grow and repair the
body through CELL REPRODUCTION
 Mitosis

2 identical cells are made from one cell.
 Body

= cell reproduction of the body cells (like in
your TOES).
Cells: are cells that make up most of the body.
Skin, bone, blood, stomach
 Most
of the cell’s time is spent GROWING,
dividing only happens a little.
 Cell
membrane
 Cytoplasm
 Nucleus
 Nuclear membrane
 Chromosomes
 Centrioles
 Interphase
 Prophase
 Metaphase
 Anaphase
 Telophase
 Cells
spend most of their life in this phase
 Period between cell divisions - normal cell
activities occurring
 Cell GROWS
 Chromosomes are copied (# doubled)
 Cell prepares for cell division
 Chromosomes
chromatids.
doubled becoming sister
Sister Chromatid
 DNA
(chromosomes) become visible (black
squiggly lines).
 Nuclear membrane breaks down.
 Spindle Fibers appear.
 Spindle
Fibers PULL sister chromatids to
the middle of the cell.
 Chromosomes line up in the MIDDLE.
 Spindle
Fibers PULL the Sister Chromatids
apart.
 Sister Chromatids separate from their copies
and move to opposite sides of the cell.
 Exact same chromosomes are at each end of
cell
 Each
end of cell has complete set of chromosomes
 Fibers disappear
 Nuclear membrane reforms around each set of
chromosomes
 Cell membrane begins to pinch until cytoplasm is
divided in half
 Two identical cells are formed
 One


cell becomes TWO cells.
Each cell has identical chromosomes.
They have the same number of chromosomes
as the cell they originally came from.