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Samenvatting collegeaantekeningen 'Cel tot Molecuul' Thema 1
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HC 2: MITOSE EN MEIOSEMens: 46 chromosomen, 23 paar.
Doel mitose en meiose:
- Voortplanting
- Groei
- Herstel
Mitose = dochtercellen voor groei en herstel
Meiose = gameten voor voortplanting
Centromeer = plek waar DNA na replicatie aan elkaar wordt gehouden
Kinetochoor = structuur van eiwitten waar de microtubuli zich aan hechten
Microtubuli = spoeldraden om DNA uit elkaar te trekken
Centrosoom = twee centriolen waar de micortubuli zich vormen
Mitose:
Celcyclus:
, Interfase:
- Duidelijke kern
- DNA gedespiraliseerd
- Voorbereiding mitose
Replicatie chromosomn
Productie eiwitten en organellen voor dochtercellen
Verdubbelen centrosomen
Profase:
- Condensatie chromatine
Zichtbare chromosomen
- Kernmembraan verdwijnt
- Centrosomen verplaatsen zich naar polen
- Vorming spoeldraden
Pro-metafase:
- Chromosomen gecondenseerd
- Spoeldraden binden aan kinotochoor
- Chromosomen gaan bewegen richting het vlak
Metafase:
- Chromosomen liggen op equatoriaal vlak
Anafase:
- Splitsing chromatiden
Telofase:
- Chromosomen op tegenoverliggende polen
Vorming dochtercellen
Vorming kern
- Spoeldraden verdwijnen
Cytokinese:
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