what are the answers to these questions?

what are the answers to these questions?
Imagine that you are breeding a specific type of plant or animal and there is a characteristic that you want your breed to have, but it is a recessive one. Is it possible to devise a breeding plan that will result in that characteristic becoming universal among each subsequent generation?
Try to imagine a hypothetical breeding population and its gene pool (collectively, all the various alleles present in the whole population) – it doesn’t matter what species you think of; it could be elephants or grasshoppers. Imagine both a huge breeding population (millions of individuals) and a very small one (perhaps just dozens of individuals). Why would the smaller population be more strongly or easily affected by evolutionary processes than the larger one?