What specific genetic factor heavily influences the final size of a Whoodle puppy?

Answer

Whether a Miniature or Toy Poodle was used in the breeding

The size categorization of the Whoodle—small to medium—is subject to significant variability based on the size of the Poodle parent involved in the cross. While Miniature Poodles are common, using a Toy Poodle results in a smaller dog, whereas utilizing a Standard Poodle will yield a larger final size. The text indicates that the weight range of 20 to 40 pounds and height range of 12 to 18 inches are generalizations heavily dependent on this specific parental choice.

What specific genetic factor heavily influences the final size of a Whoodle puppy?
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