Need to be copied exactly so
new cells can be produced for...
Growth
Repair to damaged tissues
Replacing old worn out cells
Produces two
identical cells with the
same amount of
chromosomes.
Produces 2 genetically
identical diploid cells
Diploid = A cell that contains two sets of
chromosomes.
Cell division produces Gametes
A human body cell
contains 46 chromosomes
(23 pairs)
Human gametes are
haploid, so their nucleus
only contains a single set of
23 unpaired chromosomes
Produces 4 genetically
different haploid cells
Haploid = A sex cell (gamete) that contains one
set of chromosomes.
Gamete is a sex cell
Chromosomes make identical copies
of themselves. Identical
chromosomes then pair up. Sections
of the DNA get swapped.The pairs of
Chromosomes divide and then the
chromosomes divide.
Chromosomes in the nucleas are copied and then
chromatids are pulled apart and moved toward the
poles. Chromosomes seperate and the cell divides to
form two identical daughter cells.