Answer:
1. 2 alleles, solid brown and spotted
2. 1 dominant, spotted, and one recessive, solid
3. Dominant: 16/24 Recessive: 8/24. Spotted- R, solid, r. There are 6 RR, 4 Rr and 2 rr.
4. It would slowly become more common and common. When a spotted and a solid pairs, its still most likely that the offspring will be spotted, however as most spotted die the number of spotted getting offsprings decrease.
5. No genetic variation, everyone in the population has that trait