Question

Which of the following shows a reduction of chromosomes by half?

Male gametophyte to flagellated sperm

Sporophyte to spores

Male gametophyte to spores

Female gametophyte to zygote

Answer 1

I'm not going to tell you the answer, but here are a couple of small hints:
- gametes are always haploid, zygotes are always diploid
- a typical plant life cycle goes like this:
sporophyte -> spore -> gametophyte -> gametes -> zygote -> sporophyte

You need to figure out where in the life cycle meiosis takes place. Any ideas?