A teacher leads a class discussion on the students' physical traits and which of their parents they look more like. Some students state that
they look like their fathers; others state they look like their mothers,
and a few state that they look like a mixture of both parents. The
students were then asked to determine which macromolecules play a
major role in the passing of genetic information from parent to
offspring.
Which macromolecule should the students choose?