A diploid parent plant body produces ________ gametes and a haploid parent plant body produces ________ gametes?

diploid, haploid haploid, diploid diploid, diploid haploid, haploid

haploid, haploid

A diploid parent plant body produces haploid gametes through reductional division, and a haploid parent plant body produces haploid gametes through reductional division (by equational division). As the gametes are to be haploid since after union they will re-establish the ploidy level similar to the parent generation.