What are multiple alleles? Give an examp...

What are multiple alleles? Give an example.

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When a gene expresses itself in more than 2 allelic forms, then the alleles are called multiple alleles.
e.g: The gene 'T' controls the human blood group. It exist in 3 different allelic forms i.e., I, 1P, and i, and is responsible for the four human blood groups viz, A, B, O and AB. .

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