AIPMT PRELIMS 2010 Botany Blood Groups MCQ Question
ABO blood groups in humans are controlled by the gene I. It has three alleles–Iᴬ, Iᴮ and i. Since there are three different alleles, six different genotypes are possible. How many phenotypes can occur?
Two
Three
One
Four
Correct Answer
Detailed Explanation
ABO blood group system is an example of multiple alleles but we will inherit only two alleles of a genes. So, the total number of phenotypes will be four.
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