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Principles of Inheritance and Variation
ABO blood groups – multiple alleles and co-dominance
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2018 1 question
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Which of the following characteristics represent 'Inheritance of blood groups' in humans? a. Dominance b. Co-dominance c. Multiple allele d. Incomplete dominance e. Polygenic inheritance
ABO inheritance shows dominance, co-dominance and multiple alleles.
$I^AI^O$, $I^BI^O$ – dominant–recessive relationship $I^AI^B$ – co-dominance $I^A$, $I^B$ and $I^O$ – three different allelic forms of a gene (multiple allelism) So dominance, co-dominance and multiple alleles (a, b and c) are shown.