<prompt> Answer this question truthfullyHow does the binding affinity for oxygen of fetal hemoglobin HbF compare to that of adult hemoglobin HbA?  <response>: <reason> How does the binding affinity for oxygen of fetal hemoglobin HbF compare to that of adult hemoglobin HbA? Fetal hemoglobin HbF has a much higher binding affinity for O2 than adult hemoglobin HbA. 