Abiotic factors (non-living things) in a tropical rainforest include temperature, humidity, soil composition, air, and many others. A few of the many biotic factors (living things) in that forest are toucans, frogs, snakes, and anteaters. All of the biotic factors are dependent upon the abiotic factors
It would most likely DECREASE the genetic variation in a population
RrYy x rryy will yield the phenotypic ratio you want, I think
