Asexual reproduction produces genetically identical cells. This is because is
only involves one parent cell. There is no joining or mixing from two parents.
Within the parent cell there are chromosomes, which are made up of two
identical halves. The parent cell will split into to two cells and in each cell
will have one half of each chromosome.
Those chromosomes will then replicate to form full pairs and thus creating
identical cells to the parent cell.
This method of reproduction is how all plant and animal cells replace lost or
dead cells. Whereas bacteria will use this method of reproduction to produce
offspring which is why they can reproduce at a quicker rate.