In Humans, the Embryonic and Foetal Forms of Haemoglobin Have

question 38

Multiple Choice

In humans, the embryonic and foetal forms of haemoglobin have a higher affinity for oxygen than that of adults. Why is this the case?

• A) Nonidentical genes produce different versions of globins during development.
• B) Pseudogenes interfere with gene expression in adults.
• C) The attachment of methyl groups to cytosine following birth changes the type of haemoglobin produced.
• D) Histone proteins change shape during embryonic development.