Final answer:
Young male baboons joining a neighboring troop may have an opportunity to reproduce with females and increase genetic diversity within the baboon population.
Step-by-step explanation:
The likely outcome of movement by young males leaving a baboon troop to join a neighboring troop is that they may have a chance to reproduce with females in the new troop. As females tend to stay with the troop, joining a new troop increases the chances for young males to find mating opportunities.
This movement also allows for more genetic diversity within the baboon population, as young males can introduce new genetic material to the new troop.