Human fetal hemoglobin is characterized by:

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(D) Fetal hemoglobin $(HbF)$ consists of two alpha and two gamma polypeptide chains,whereas adult hemoglobin $(HbA)$ consists of two alpha and two bet

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Having higher affinity for oxygen than adult hemoglobin.

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(D) Fetal hemoglobin $(HbF)$ consists of two alpha and two gamma polypeptide chains,whereas adult hemoglobin $(HbA)$ consists of two alpha and two beta chains.Due to its structural differences,fetal hemoglobin has a higher affinity for oxygen compared to adult hemoglobin.This higher affinity allows the fetus to effectively extract oxygen from the maternal blood across the placenta,ensuring the survival and development of the fetus.

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