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Nódulo de recombinación

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Los nódulos de recombinación son una parte del complejo sinaptonémico. Es el lugar donde se produce el entrecruzamiento (crossing-over) de los cromosomas homólogos.

Esto tiene lugar en la etapa del Paquiteno, durante la Profase I de la Meiosis.

Constituye una estructura proteica que contiene las enzimas necesarias para el intercambio de genes (información genética) entre las cromátidas de los dos cromosomas homólogos.

Enzimas como: endonucleasas, ADN polimerasa, ADN ligasa y otras imprescindibles para que acontezca el sobrecruzamiento. Estas enzimas fragmentan la doble hélice de ADN, luego estos fragmentos son intercambiados y se fusiona de nuevo la nueva doble hélice con la ayuda de las enzimas.

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Transcription

Referencias

Biología, Oxford Education. Bloque II: Fisiología celular. Pág 194.

Esta página se editó por última vez el 23 oct 2019 a las 08:01.
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