Question: Why do so many geneticists focus on studying yeast, fruit flies, nematodes, mice or the small plant Arabidopsis? Need Assignment Help? O These pest organisms result in millions of dollars of damage and hurt the economy. O They are ideal for modeling human disease since they have all the same organs. They have multiple features that allow for cheap, fast and efficient manipulation of genes and chromosomes. O They are some of the few organisms in which mutations can be generated.