What factor heavily influences the size variation observed in Yorkiepoo offspring?

Answer

Whether the Poodle parent was a Miniature or a Toy variety

While the genetic combination results in variability, the overall size range for Yorkiepoos is relatively constrained because both parent breeds are inherently small. The most significant factor determining where an individual dog falls within that small spectrum is the size classification of the Poodle used in the cross. If the Poodle parent was a Miniature variety versus a Toy variety, this input strongly influences whether the resulting Yorkiepoo puppy will trend toward the higher end or lower end of the general adult weight spectrum, which typically culminates between 4 to 10 pounds.

What factor heavily influences the size variation observed in Yorkiepoo offspring?
DogbreedYorkshire TerrierYorkiepooPoodle