understand that division of a diploid cell by mitosis produces two cells which contain identical sets of chromosomes.
INTERPHASE
-in a microscope we would see the nucleus as a spherical structure- you would not see the chromosomes.
-DNA replication occurs.
PROPHASE
- the first sign which shows that a cell is entering the process of mitosis and cell division is when we see the break down of the nucleus membrane.
-the chromosomes become visible as a pair of chromatids- in pairs.
LATE PROPHASE
-the nucleus is gone.
-network of protein molecule- called spindle (each one is a fibre)- extend from pole of the cell to the other.
-the chromosomes pair (the pair of chromatids) will move towards the spindle and will join onto one of the spindle fibres.
METAPHASE
-pair of chromatids are attached to the spindle fibre.
-the chromosomes are in the middle- arranged across the equator of the cell.
ANAPHASE
-the spindle fibre shortens- the pair of chromatids are moving apart and they move to the pole of the cells.
-separation of the pair of the chromatids.
TELOPHASE
-end of mitosis.
-the nucleus begins to reform around the chromosomes at either end of the cell- will be the new nucleus of the new cell.
-the formation of 2 nuclei at opposite ends of the cell.
CYTOKINESIS
-cell split into two- not part of mitosis.
-cell begins to move inwards to divide cytoplasm in half- membrane fuse across equator to form the two cells.
-the new cells each contain a chromosome which is the same as the parental cell.
MITOSIS
P- appear
M-middle
A- apart
T- two
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