I was reading the description of the Azer in D&D 5e. Part of their description is that they resemble a male dwarf. Another part of their description is that they are crafted from bronze and imbued with a part of the crafter's inner flame.
My question is wider than for just the Azer, and could be applied to other "created" races such as AI Robots, or D&D warforged.
What constraints would there be to keep the general form of the offspring similar to the creator/parent?
I'm not asking about the Azer specifically, but an answer could use them or something similar to illustrate a point.
For additional clarity, this is in reference to a race that reproduces itself by constructing them in some other manner than biologically bearing offspring, but the offspring are still very similar in form to the "parent(s)".