Question

If a plant has the TtSs genotype, what would the genotypes of its gametes be?

Answer 1

If the T and S genes are located on different chromosomes, those chromosomes can (and will) assort independently of each other during meiosis. So each gamete could possibly get either the T or t, and it could also get either the S or s.

Answer 2

Only one allele for each trait can be in a gamete, so there can be four combinations: TS, Ts,tS, and ts.