cromozomii
DESCRIPTION
ppt biologieTRANSCRIPT
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NUCLEUL
CROMOZOMII
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Clasificare cromozomi
• Materialul ereditar din nucleu este organizat in cromozomi.
• Cromozomii sunt:• De tip procariot -1 cromozom circular
alcatuit din AND puternic condensat.• De tip eucariot –alcatuit din
AND,proteine,lipide,ioni Mg,Ca.Numarul difera in functie de specie.
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Cromozomul uman
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Numarul de cromozomi la diferite specii de plante si animale
• SPECII NR. CROMOZOMI• Ceapa 16• Porumb 20 • Cartof 48• Musculita otet 8• Soarece 40• Caine 78• Om 46
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Cariograma la om22 perechi de autozomi-XX si o pereche de heterozomi-XY
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