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Samenvatting Schema: verloop van mitose en cytokinese in een dierlijke cel $4.36   Add to cart
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Summary

Samenvatting Schema: verloop van mitose en cytokinese in een dierlijke cel

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  • Course
  • Biologie
  • Institution
  • KSO
  • Book
  • Biogenie 5.2 - leerboek

Dit schema toont het verloop aan van van mitose in een dierlijke cel. Hier vind je dus de profase, anafase, telofase, enz terug.

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Document information

  • No
  • Thema 2
  • July 8, 2021
  • 5
  • 2020/2021
  • Summary

Subjects

  • biologie
  • biogenie
  • delen
  • mitose
  • meiose
  • anafase
  • telofase
  • profase
  • verloop
  • cytokinese
  • dierlijke cel
  • metafase
  • dna

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Written for

  • Secondary school
  • KSO
  • Biologie
  • 5
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Content preview

chromosoom met 2 zusterchromatide



centriolenpaar kinetochoren
op het centromeer




polaire microtubuli


evenaarsvlak

kinetochore microtubuli



nucleolus astrale microtubuli



samentrekbare ring


chromosoom



chromatinevezels
kernmembraan

, MEIOSE = 2 opeenvolgende celdelingen waardoor er uit één diploïde , 4 haploïde cellen ontstaaann.
● verhoopt in 4 fasen + cytokinese
● voorbereiding is identeiek de zelfde als bij de interfase mitose

Belang ● Productie van haploïde gameten
○ Meiose voorkomt een progressieve verdubbeling van het aantal chromosomen bij een bevruchting
● Productie van genetisch unieke gameten
○ Variatie in gameten
■ door recombinatie van DNA door crossing-over (tijdens profase 1)
■ door toevallige combinatie van chromosomen door mixing
● Mixing = tijdens anafase: toevallig migreren van maternale of paternale homologe
chromosomen naar één kant van de cel → genetisch unieke gameten




● Genetische variatie
○ voor in stand houden van de soort (bij gewijzigde leefomstandigheden)
○ Voorbeeld: organismen bestand tegen koude

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