16 is the answer. 16 chromosomes will be in each of the gametes.
Gametes are haploid cells. Haploid cells contain one set of chromosomes and diploid cells contain 2 set of chromosomes from both parents.
If a diploid cell in aplant has 32 chromosomes, haploid cells in that same plants will have 16 chromosomes as they ckntain half the number of chromosomes seen in diploid cells.