Alleles are different forms of many possible alternative forms of the same gene. The different eye colors are for example different alleles of the genes that make the eye color.

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can recessive alleles produce codominance?

Maybe I'm confused by the term "codominance", but I wondering if codominance only occurs with two dominant alleles. Can two recessive alleles produce codominance in an individual? Likewise, can two ...
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Mitotic crossover happens in G1?

I was reading this article in wikipedia and came across this : It has been suggested that recombination takes place during G1, when the DNA is in its 2-strand phase, and replicated during DNA ...