Hoofdstuk 12: Eukaryotische celdeling
• Celdeling: → Interfase
2n • G1-fase = gap-fase
↓ • S-fase = DNA-synthese
4n • G2-fase = gap-fase
↓ • M-fase = chromosoomverdeling
2x2n • Einde M-fase = cytokinese of celdeling
⤷ bij mitose • Mitose = kerndeling
• Mitose: pro-, meta-, ana - en telofase
→ Profase: compacter worden van chromosomen
→ Metafase: kernmembraan verdwenen, chromosomen naar vlak in het midden cel en
hechten aan spoelfiguur
→ Anafase: chromatiden uit elkaar
→ Telofase: chromosomen minder compact, nieuw kernmembraan, begin cytokinese
• Spoelfiguur: microtubuli-organiserend centrum = centrosoom
• Dieren: centrosoom bevat centriolen
• Kinetochoor: hiermee zijn de microtubuli aan de centromeer verbonden
• Bij dieren is er een insnoering, bij planten ontstaat een celplaat
• Fragmoplast: structuur waaruit de nieuwe celwand zich ontwikkelt, bestaat uit microtubuli
• Meiose: 2n → 4n → n
→ Tijdens metafase: chromosomen gepaard met homoloog
⤷ cross-overs via homologe recombinatie (=chiasmata)
→ Eerste meiotische deling: mater- en paternale random verdeeld
→ Tweede meiotische deling: zusterchromatiden uit elkaar
• Non-disjunctie => trisomie
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller ameliakirkov. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $5.34. You're not tied to anything after your purchase.