My educated guess should be the 3rd one
It is codominant inheritance because, if the placement of the A and B molecules on each cell is controlled by the proteins that are coded by different versions of the same gene, then <span>IA and IB </span><span>are codominant but both are dominant to I<span>o</span>. If a person receives an <span>IA </span>allele and a <span>IB</span> allele, their blood type is type AB, in which characteristics of both A and B antigens are expressed.
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The small intestine i think :) hope that helps
There are three variables independent, dependent ,and controlled
Atomic mass is the answer
if u hav any more questions in chemistry ask me! I am very good at chemistry.