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Doctors Medicines MCQs Q&A

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The dominant allele (for example, B) is the one that, in a normal cross, will show up in the phenotype if either one or two of itself are present. So, if Bb and BB produce the same phenotype, you know that B is dominant because both 1 and 2 B's produce the same result The recessive allele (for example, b) is the one that needs two of itself in order to be expressed in the phenotype. So, if b is recessive and B is dominant, only bb will show the recessive allele in the phenotype.

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