In the plant arabidopsis thaliana, a geneticist is interested in the development of trichomes (small projections). a large screen turns up two mutant plants (a and b) that have no trichomes, and these mutants seem to be potentially useful in studying trichome development. (if they were determined by single-gene mutations, then finding the normal and abnormal functions of these genes would be instructive.) each plant is crossed with wild type; in both cases, the next generation (f1) had normal trichomes. when f1 plants were selfed, the resulting f2's were as follows: f2 from mutant a: 602 normal; 198 no trichomes f2 from mutant b: 267 normal; 93 no trichomes what can be deduced about the trichome mutants?