Leifmk
Deity
Are dwarves in the series just like dwarves in real life, just genetically that way, or is there some other reason? How do they differ from real life?
They do not appear to differ from real life at all; dwarfism is any one of a whole slew of genetic/medical conditions resulting in unusually short stature. In a pre-modern society, like anyone else who visibly differs from the norm, dwarfs are often subject to prejudice and superstition (and I believe Tyrion says as much that if he weren't noble he might have been left in the forest to die as an infant).