| In the latter case it is often called the paranucleus or micronucleus. |
| Tetrahymena divide by binary fission during vegetative growth, and the micronucleus and macronucleus are propagated by mitotic and amitotic division, respectively. |
| In order to test for structural changes the in vitro micronucleus assay has been widely adopted. |
| The macronucleus is spherical, centrally placed, and with one micronucleus closely applied. |
| The lost chromosome may form a micronucleus that can be detected cytogenetically. |
| As a result, the normal complement of DNA in the micronucleus is 4C during the amitotic division of the macronucleus and cytokinesis. |
