A<unk><unk>  is a period involving 1 generation of an organism through means of reproduction, whether through asexual reproduction or sexual reproduction. In regard to its ploidy, there are 3 types of<unk> s:
haplontic<unk><unk> 
diplontic<unk><unk> 
diplobiontic<unk><unk>  (also referred to as diplohaplontic, haplodiplontic, or dibiontic<unk><unk> 
These three types of<unk> s feature alternating haploid and [[allgerminates. To return to a haploid stage, meiosis must occur (see Cell division). The<unk> s differ in the product of meiosis, and wether mitosis (growth) occurs. Zygotic and gametic meioses have one mitotic stage and form: during the n phase in zygotic meiosis and during the 2n phase in gametic meiosis. Therefore, zygotic and gametic meiosis are collectively term haplobiontic (single mitosis per phase). Sporic meiosis, on the other hand, has two mitosis events (diplobiontic): one in each phase.
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