monogenesis in British English
(ˌmɒnəʊˈdʒɛnɪsɪs), monogenism (mɒˈnɒdʒəˌnɪzəm) or monogeny (mɒˈnɒdʒɪnɪ)
noun1. the hypothetical descent of all organisms from a single cell or organism
2. asexual reproduction in animals
3. the direct development of an ovum into an organism resembling the adult
4. the hypothetical descent of all human beings from a single pair of ancestors
Compare polygenesis