AP Biology 11: MEIOSIS VS MITOSIS

1. Meiosis requires two nuclear divisions; mitosis requires only one nuclear division. 2. Meiosis produces four daughter nuclei and four daughter cells; mitosis produces only two. 3. The daughter cells produced by meiosis are haploid; the daughter cells produced by mitosis are diploid. 4. The daughter cells produced by meiosis are not genetically identical; the daughter cells produced by mitosis are genetically identical to each other and to the parental cell.OCCURRENCES:- In humans, meiosis occurs only in reproductive organs to produce gametes. - Mitosis occurs in all tissues for growth and repair.MEIOSIS I:- PROPHASE I: homologous chromosomes pairs undergo crossing-over- METAPHASE I: bivalents align at the metaphase plate- ANAPHASE I: homologous chromosomes (with centromeres intact) separate and move to opposite poles; in mitosis at this stage, sister chromatids separate and move to opposite poles.MEIOSIS II:Events of meiosis II are the same stages as in mitosis. However, in meiosis II, the nuclei contain the haploid number of chromosomes.