The plants we are familiar with are called sporophytes or the sporophyte generation. Do these plants have bodies made up of diploid cells or haploid ones? In which organs does meiosis occur (two are correct)—leaves, stems, stamens, roots, carpels, or petals? When plants undergo meiosis, do all cells of the plant undergo meiosis? Do all cells become haploid, or does meiosis occur in just a few cells in some flower parts?