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Biologie havo 4 thema 2: Voortplanting - samenvatting
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Par. 1: Ongeslachtelijke voortplanting.CELDELING = uit 1 moedercel, 2 dochtercellen (met dezelfde erf. eigenschap = DNA)
- bij voortplanting (ontstaan van organisme)
- groei van organisme
- herstel (vernieuwen van cellen)
VOORTPLANTING = zorgen voor nakomelingen.
2 manieren……….
● GESLACHTELIJKE VOORTPLANTING (meercellige organismen)
- nieuwe organismen ontstaan door samenstelling van genetisch materiaal van
2 organismen
- nakomelingen verschillen van ouders
● ONGESLACHTELIJKE VOORTPLANTING (eencellige organismen)
- nieuwe organismen zijn gemaakt door celdeling (= cellen kopiëren)
- er komen geen andere genetisch materiaal
- nakomeling is (genetisch) identiek aan ouder
, CELCYCLUS
bestaat uit………
● INTERFASE
- G1 - fase
stofwisseling
celgroei
- S - fase
DNA wordt verdubbeld
chromosomen bestaan aan het eind van deze fase uit 2 chromatiden
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