Question

What will happen to oxygen dissociation curve of the adult blood is replaced with the fetal blood?

Answer 1

For mothers to deliver oxygen to a fetus, it is necessary for the fetal hemoglobin to extract oxygen from the maternal oxygenated hemoglobin across the placenta. The higher oxygen affinity required for fetal hemoglobin is achieved by the protein subunit γ (gamma), instead of the β (beta) subunit.