Question at position 15 Select all concepts that are at play with human blood type.multiple allelesepistasisincomplete dominancecodominancelinked genes

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The question asks us to select all concepts that are at play with human blood type.
Option 1: multiple alleles. This is correct because human ABO blood types are determined by more than two alleles (IA, IB, i) at the same gene locus, which is the classic example of multiple alleles in a population.
Option 2: epistasis. This option is not applicable to the basic ABO blood group system as described; epistasis involves one gene affecting the expression of another gene, which is not the standard mechanism generating ABO blood types.
Option 3: incomplete dominance. Incomplete dominance would produce a blended phenotype between two alleles, which is not how ABO blood groups express (A and B are codominant, and i is recessive to both, rather than producing a blend).
Option 4: codominance. This is correct because IA and IB alleles are codominant, meaning both A and B antigens are expressed when IAIB individuals possess both alleles, resulting in the AB phenotype.
Option 5: linked genes. This concept refers to genes located close together on the same chromosome that tend to be inherited together, which is not the defining mechanism behind ABO blood types and thus not a primary concept at play here.

Question at position 15 Select all concepts that are at play with human blood type.multiple allelesepistasisincomplete dominancecodominancelinked genes

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