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MolBio (Fach) / Meiosis + Cytokinesis (Lektion)
- Prophase I Leptotene: Condensation of chromosomes Zygotene: homologous chromosomes begin to form synapsis; hold together by synaptonemal complex Pachytene: bivalent;crossing over Diplotene: synaptonemal complex breaks down, but chromosomes remain attached by chiasmata Diakinesis: only the terminal chiasmata connects the two chromosomes
- Metaphase I nuclear membrane disappears spindle forms bivalent -> equatorial plane
- Anaphase I disjunction happens random segregation (distribution of chromosomes) 223 combinations possible
- Telophase I two haploid sets at poles of the cell
- Meiosis II similar to Mitosis, but haploid no DNA-replication
- Cytokinesis Division in two haploid daughter cells enters meiotic interpahse -when compared to mitosis is this phase brief -Interkinesis + Meiosis II begins
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