- Created by: revisionprodigy
- Created on: 03-04-15 19:48
All chromosomes are found in the nucleus of a cell.
The nucleus is surrounded by a membrane called the nuclear envelope.
Before mitosis begins, each chromosome duplicates to consist of two strands called chromatids*
*each chromatid is long and thin.
The choromatids condense- they become shorter, thicker and more visible. They are joined together at the centromere.
The nuclear envelope disappears.
Tiny spindle fibres spread out from each end of the cell and attatch to he centromere of each chromosome.
The spindle fibres arrange each chromosome in the centre of the cell.
the spindle fibres contract, pulling the two chromatids apart
a nuclear envelope forms around each new set of chromosomes, and the cell itself starts to divide
the cell finishes dividing in two and the chromosomes become longer and thinner
both cells are IDENTICAL and contain 46 chormosomes
MITOSIS : DIVISION OF A PARENT CELL THAT PRODUCES TWO GENETICALLY IDENTICAL DIPLOID CELLS