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Meiosis I
- interphase - replication and bivalent pairs.
- prophase - spindle fibres begin to form and chiamata- crossing over of bivalents.
- metaphase - chromosomes line up at equator and attach via centromeres to spindle fibres and nuclear *membrane disappears
- anaphase - spindle fibres pull chromosomes to poles
- telophase - nuclear membranes reform.
- cytokinesis - may occur
Meiosis II
- prophase - centrioles divide and move to poles
- metaphase - chromosomes line up at equator and attach and nuclear membranes disappear.
- anaphase - chromotids pulled to opposite poles
- telophase - nuclear membrane reforms
- cytokinesis - cytoplasm divides equally resulting in haploid gametes.
Comments
These notes are aimed at people studying Edexcel Biology A Level, but will be suitable for other exam boards too.
Originally written by animalia89 on TSR Forums.
