If a Genotype of an Organism is YySsTt,then What Does

Question

If a genotype of an organism is YySsTt,then what does yST represent?
A)a possible phenotype of the offspring
B)a possible zygote
C)the P-generation
D)the genotype of the offspring
E)a possible gamete of the parent

Accepted Answer

If genotype is YySsTt,this is a diploid organism with two alleles for each gene.Since yST is haploid (one allele for each gene),then it must be the haploid gamete.