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CODOMINANCIA
CODOMINANCIA
Es un mecanismo de interacción entre los alelos de un gen, diferente a la que describió Mendel dónde un alelo domina o enmascara al otro (Dominancia completa)
Por ejemplo, al cruzar flores rojas x flores blancas se obtuvieron flores rojas y blancas, es decir que las de la F1 expresan el fenotipo de ambos progenitores.
Si imitamos el cruzamiento que hizo Mendel para enunciar…
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Co-dominância
A co-dominância é o tipo de ausência de dominância em que o individuo heterozigoto expressa simultaneamente os dois fenótipos paternos.Como exemplo podemos considerar da cor da pelagem em bovinos da raça Shorthon: os indivÃduos homozigotos AA tem pelagem vermelha; os homozigotos BB tem pelagem branca;e os heterozigotos AB têm pelos brancos e pelos vermelhos alternadamente distribuÃdos.
