monogenesis

noun5

1. •
   The theory that mankind originated with a single ancestor or ancestral couple.
2. •
   The theory that all languages, or a particular set of languages, originated from a single source.
3. •
   The emergence from a single cause or origin.
4. •
   Development of the ovum from a parent like itself.
5. •
   Asexual/nonsexual reproduction, which involves only one parent.