Suppose, a constitutive gene is responsible for a polypeptide and this is responsible for a trait independently.
In a diploid cell, heterozygous for this locus, do both the dominant and recessive allele express simultaneously or only the dominant one does that?
If the latter one is correct, then what is the exact mechanism responsible for the masking of the expression of the recessive allele? At which level, the expression of the recessive allele gets masked?
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