Step-by-step explanation:
19. meiosis is how gametes are made which are used during reproduction
when a male gamete(pollen in this case) comes in contact with female gamete (egg) you get a whole cell with genes from both in plants this forms into a seed
so the tomato plant gets half from 1 parent and half from parent 2
20. during Meiosis the cell divides 2 times once like normal or mitosis where the cells genome(set of chromosomes) get duplicated and then divided equally to form 2 full cells then the cell divides again this time the set of chromosomes undergoes recombination where the sets of chromosomes switch some parts with each other after recombination the cell divides without duplicating the DNA leading to 2 haploid cells (4 total) with different genomes from each other creating variation in the offspring