37. How do plants use polyploidy?

By producing ovules and pollen cells which fail to go through the second part of meiosis and these cells fuse and create offspring plants with twice as many chromosomes.

For example a plant with 12 chromosomes should produce gametes with 6 chromosomes and when the gametes fuse, forms offspring with 12 chromosomes. If it is a polyploid plant species, then it could produce gametes which fail to go through the second part of meiosis and the gametes have 12 chromosome. When they fuse it creates offspring with 24 chromosomes. Instant speciation!