What is mitosis? Good definition please...?

ok so u have a "parent" cell. it wants to divide so you can have more cells. for example if u get a cut... mitotic rates increase so more skin cells can be produced. ur body is always using mitosis, but the rate is sped and slowed. so the parent cell cannot use ual reproduction, it instead uses aual mitosis. this produces two daughter cells which are more often than not identical to the parent cells. sometimes they arent and this is caused by either spontaneous mutation (rare) or "rossing over" of chromosome alleles durng the lining up in metaphase (relatively common)