Introduction
The AB blood group inheritance is a complex process that involves both genetic and environmental factors. The genetic component is responsible for determining the blood group type, while environmental factors can influence the expression of the genes involved in this process.

Explanation
The inheritance of the AB blood group is due to codominance, which means that both alleles are expressed equally in the phenotype of the individual. The alleles in this case are A and B, and they are both dominant over the O allele, which is recessive. As a result, individuals with the AB blood group have both the A and B antigens on their red blood cells.

When a person inherits an A allele from one parent and a B allele from the other parent, they will have both A and B antigens on their red blood cells. This is because the A and B alleles are codominant, meaning that they both express themselves equally in the phenotype of the individual.

If a person inherits an A allele from one parent and an O allele from the other parent, they will have the A antigen on their red blood cells, but not the B antigen. This is because the A allele is dominant over the O allele, so it will be expressed in the phenotype.

If a person inherits a B allele from one parent and an O allele from the other parent, they will have the B antigen on their red blood cells, but not the A antigen. This is because the B allele is dominant over the O allele, so it will be expressed in the phenotype.

Conclusion
In conclusion, the inheritance of the AB blood group is due to codominance, which means that both alleles are expressed equally in the phenotype of the individual. This is a complex process that involves both genetic and environmental factors, and it is important to understand it to better understand blood transfusion and blood type compatibility.

It is due to codominanace in which both A and B equally express their characters...