In a haplontic life cycle,what type of division does the zygote undergo?

The development of a gametophyte from the vegetative parts of a sporophyte without the intervention of spores is called:

What is the name of the meiosis that occurs during spore formation?

Which of the following characteristics is incorrect for a diplontic life cycle?

What is a haplontic life cycle? Explain through a chart.

Statement $X$: $Allium$ $cepa$ shows a diplontic life cycle.
Statement $Y$: The diploid sporophytic phase is the main,long-lived,dominant,photosynthetic,and independent phase.