In a round-about way yes. Romans 5 says that through one man, sin entered the world. Through one man a sin nature passed to all men. And even that 'just as by one man did all become sin, through one man [Jesus], all will be saved'.
Since the sin nature is passed on or inherited, if God created another person, or group of people, they could possibly be sinless. This would also pose a problem that if both sinned, Chirst would have to die twice for both human lines. Or it would violate 'for all have sinned' statement since one linage would be without sin.
Further, if there were other people created, it would be logical that at least one of the genealogies in the Bible would be traced back to a different.. "adam".