In Humans There Are Three Blood Type Alleles: A, B

question 27

Essay

In humans there are three blood type alleles: A, B, and O. The blood type alleles A and B are fully expressed when they are present. Neither allele is considered dominant or recessive and neither is diluted when both alleles are present. The allele O is considered recessive and indicates a lack of either the A or B allele. How many blood type alleles are found in a given individual? What are the possible genotypes of an individual with type A blood in which only the A allele is expressed?

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