First 313 words of the document:
What are the differences between mitosis and meiosis?
Mitosis is a process of asexual reproduction where a cell
divides in two and produces an identical cell with an equal number
of chromosomes in each new cell It can do this because the
chromosomes can duplicate themselves to make new copies for the
new cell. In contrast, meiosis is a process in sexual reproduction
where two cells called gametes combine to form one cell. The cells
that join only have one of each chromosome which then combine
and pair up so that the new cell contains 23 chromosome pairs.
Mitosis is used for cell reproduction, growth and repair of the
body. Meiosis is just used for sexual reproduction. Mitosis occurs in
all organisms whereas meiosis occurs in humans, animals, plants
and fungi. In mitosis, because the offspring have exactly the same
genes as the parent, there is no variation and they are clones. In
meiosis, because the offspring inherits a mixture of two sets of
chromosomes, it will inherit features from both parents and so
there is variation.
In mitosis there is just one division stage in the parent cell to
make the two new cells each with exactly the same DNA. In meiosis,
there are two stages of division the first is where the chromosome
pairs divide and line up in the cell. The second division takes place
when the two new cells have been made and the chromosomes line
up again in the centre of the cells. The arms of the chromosomes
are pulled apart and you get four gamete cells with only a single set
of chromosomes in it. In mitosis reproduction of cells occurs in body
cells whereas meiosis only occurs in reproductive organs.