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Núcleo e divisão celular🧬🔬 Na mitose ocorre apenas uma divisão celular, enquanto na meiose ocorrem duas. A mitose ocorre nas células somáticas A meiose ocorre nas células reprodutivas A anáfase 2 da meiose sempre terá metade do número de Cromossomos da anáfase da mitose. Na mitose são formadas duas células Na meiose são formadas quarto células O Cromossomos homólogo pareciam na meiose 1 O crossing-over só ocorre na prófase 1
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A síndrome de Patau está caracterizada por uma cópia extra do cromossomo 13, isso significa que há três copias do cromossomo 13 ao invés de duas. Isso se deve mais comumente a não disjunção na meiose — que ocorre em mães com idade avançada, onde os cromossomos não se separam adequadamente durante a divisão celular, resultando em um número anormal de cromossomos. Outra causa é a translocação robertsoniana desequilibrada.
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