Quote:
Unlike breeding out a single allele, many traits are complex in nature and could very feasibly be carried forward through multiple generations, even without a re-injection.


Absolutely, Sarcasta. HERDA, OLWS and HYPP not diluting (or disappearing) at every N/N mating with a carrier is proof of how one trait might work.

Another would be proven ancestral influence from way back, such as the X-Factor (large heart gene).