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dihibridismo

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dihibridismo consiste en análisis de 2 características ubicadas en genes y cromosomas diferentes, en un cruzamiento de 2 individuos
Se pueden dar homocigotos dobles (ambas características son homocigotas dominantes o homocigotas recesivas), heterocigotos dobles (ambas son heterocigotas) y heterocigotos simples (uno es heterocigoto y el otro es homocigoto)
Dominancia incompleta o intermedia e da un intermedio entre el gen dominante y el recesivo.
Ejemplo 1 al cruzar rojas puras y blancas puras, se expresa el intermedio entre los 2 genes, resultando toda la generación filial rosada, y luego cuando la rosada se auto fecunda vuelven a salir los colores puros con las leyes de genética clásica
Codominancia o dominancia compartida se expresan los 2 alelos del gen y ambos dominan pero en diferentes células cada una, notándose manchas o pigmentos de los 2 colores. Por lo tanto existe una codominancia, ambos genes se expresan y son dominantes.
Alelos múltiples son los casos en los que hay 3 o más posibilidades para una característica, como pasa en el caso del color de ojos o los grupos sanguíneos. Dentro de los grupos sanguíneos es importante manejar que existe AA, AO; BB, BO; OO; AB.
Created by: trollface
 

 



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