5The numbers The cells created from mitosis are diploid or 2n. The cells created from meiosis are haploid or nDefinitions:Diploid (2n) – two of each type of chromosome (in homologous pair – carry the same trait)Haploid (n) – one of each type of chromosome
6Let’s try it… Human cells have 46 chromosomes. Therefore, the diploid number (2n) of chromosomes in humans is 46.The haploid number (n) of chromosomes in humans is 23.
7The reason why: mitosis To replace other cells that have been damaged or worn outTo allow multicellular organisms to growFor asexual reproductionBecause they get too big!
8The reason why: meiosis Meiosis results in four cells with half the number of chromosomes so that when the sex cells (sperm and egg) combine, the original or normal number of chromosomes will be restored
9One last thing… [the] where? Mitosis occurs in normal body cells (i.e. skin cells), and meiosis occurs in sex cells (i.e. sperm and egg) only.