Which of the following statements explains how hemoglobin in a human embryo has a higher affinity for oxygen than hemoglobin in the adult?
A) Nonidentical genes produce different versions of globins at different stages of development.
B) Globin pseudogenes interfere with gene expression in adults.
C) Imprinting of globin genes changes the type of hemoglobin produced after birth.
D) Throughout development, mutations accumulate during DNA replication altering the adult form.

Question

Quizplus · Accepted Answer

Hemoglobin in a human embryo has a higher affinity for oxygen than in an adult because different versions of globins are produced at different stages of development, due to the expression of nonidentical genes. This allows the embryo to effectively extract oxygen from maternal blood.

Which of the Following Statements Explains How Hemoglobin in a Human