Where did the height come from?

We took Parker and Addi to the Dr., it was Add's 3 year check up and Parker's 4 month check up.

Addi's Stats:

40 inches (off the charts)

33 pounds (about average)

Parker's Stats: 

26 3/4 inches (off the charts)

15.15 pounds (95%)

Dr. Anderson said "Geeze, where in the world did their height come from?"
We have absolutely NO idea. Everyone says that Ty must not be the dad ha ha.