adn cromozomi 2012
DESCRIPTION
ADN- Baza moleculara a ereditatiiTRANSCRIPT
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ADN: Baza moleculară a
eredităţii
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Caracteristicile materialului genetic
1. Trebuie să conţină informaţie complexă
• să stocheze cantitate mare de informaţie
• informaţia să aibă capacitatea de a varia
• materialul genetic să fie stabil
2. Trebuie să se replice fidel
3. Trebuie să codifice fenotipul
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Principiul transformării (Griffith)
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Natura principiului transformării: Experimentul lui Avery, MacLeod şi McCarty
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Experimentul Hershey-Chase
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Experimentul Hershey-Chase
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Difracţia în raze X
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Structura 3D a ADN-ului
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Structura 3D a ADN-ului
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Structura 3D a ADN-ului
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Structura cromozomilor
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Structura terțiară a ADN
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Structura terțiară a ADN
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23 de perechi…
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Structură și tipuri
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Cariotip