Which of the following hemoglobins normally predominates at the time of birth?
A) alpha2,epsilon2
B) alpha2,gamma2
C) alpha2,beta2
D) alpha2,delta2

Question

Quizplus · Accepted Answer

At the time of birth, fetal hemoglobin (HbF) predominates, which is composed of two alpha-globin chains and two gamma-globin chains (alpha2, gamma2). HbF has a higher affinity for oxygen than adult hemoglobin (HbA), which allows for efficient oxygen transfer from mother to fetus. During the first few months of life, HbF levels decrease and are replaced by adult hemoglobin (HbA) which is composed of two alpha-globin chains and two beta-globin chains (alpha2, beta2).

Which of the Following Hemoglobins Normally Predominates at the Time