What is the primary factor determining whether a Maltipom puppy approaches the upper or lower end of its expected size range?

Answer

Genetics

Because the Maltipom is a first-generation crossbreed, the genetic expression inherited from either the Maltese or Pomeranian parent significantly influences the final size.

What is the primary factor determining whether a Maltipom puppy approaches the upper or lower end of its expected size range?
sizeDogbreedMaltipom