What is the significance of the differences in amino acid sequence between adult and fetal hemoglobin in terms of oxygen transport?

A Adult hemoglobin has a higher affinity for oxygen than fetal hemoglobin
B Fetal hemoglobin has a higher affinity for oxygen than adult hemoglobin ✓
C Adult and fetal hemoglobin have the same affinity for oxygen
D The differences in amino acid sequence do not affect oxygen transport

Explanation

The differences in amino acid sequence between adult and fetal hemoglobin result in fetal hemoglobin having a higher affinity for oxygen, allowing for efficient oxygen transfer from mother to fetus.

Source

Berne and Levy Physiology
Hematology Hematology: Hemoglobin and Oxygen Transport Hematology: Hemoglobin and Oxygen Transport Hard MEDICAL Confidence: high