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Our blood groups are composed of two "letters", one from both parets.
People with Blood group B can have the type BB or B0 (IBi).
if they both have a blood group B0 (that is IBi) they can both give their children the "0" part of their blood group, and the child will have a 0 blood group.
The answer is
<span>c. both are IBi (that is both are B0).</span>
A gene is the basic physical and functional unit of heredity. Genes are made up of DNA. Some genes act as instructions to make molecules called proteins. ... Alleles are forms of the same gene with small differences in their sequence of DNA bases