وقت گذرڻ سان گڏ، جيئن ئي نئي آبادي پنهنجي نئين ماحول کي اختيار ڪرڻ لڳي ٿي تئين اهي گهٽ ڏسڻ ۽ ٻي آبادي وانگر گهٽ نظر اچن ٿا.
Over time, as the new population begins to adapt to their new environment, they start to look less and less like the other population.