Cell Division: There are two types of cell division; Mitosis used for growth, repair & asexual reproduction – Meiosis used to produce gametes for sexual reproduction – Mitosis Meiosis Produces 2 daughter cells Produces 4 gametes Daughter cells are diploid (i.e. Daughter cells are haploid (i.e. only have 23 chromosomes) have 23 pairs of chromosomes) Daughter cells are genetically Gametes are identical to each other genetically different to each other Daughter cells are genetically Gametes are identical to parent cell genetically different to parent Occurs in one stage cell Happens everywhere in the Occurs in two stages body Happens in reproductive organs only Therefore, fertilization produces a diploid cell will grow by mitosis) from two haploid gametes.
Cell Division: There are two types of cell division; Mitosis – used for growth, repair & asexual reproduction Meiosis – used to produce gametes for sexual reproduction Mitosis Meiosis Produces 2 daughter cells Daughter cells are diploid (i.e. only have 23 chromosomes) Daughter cells are genetically identical to each other Daughter cells are genetically identical to parent cell Occurs in one stage Happens everywhere in the body Produces 4 gametes Daughter cells are haploid (i.e. have 23 pairs of chromosomes) Gametes are genetically different to each other Gametes are genetically different to parent cell Occurs in two stages Happens in reproductive organs only Therefore, fertilization produces a diploid cell will grow by mitosis) from two haploid gametes.
igcse_biology_revision_book.docx