| In mammals, germ cells undergo a small number of proliferative mitotic cell divisions as they migrate to the gonad. |
| Histologically, these lesions form a spectrum of tumors ranging from benign cystic adenomas to proliferative cystic sebaceous tumors. |
| The mass was excised and was characterized histologically as another proliferative cystic sebaceous tumor. |
| Flies homozygous for such hypomorphic mutations reach adulthood, but often exhibit defects during the proliferative stages of gametogenesis. |
| They subsequently determined that cells within the ribbon were dividing, implying that they were part of a region of proliferative stem cells. |
| Differentiated cells however, generally have limited proliferative power and only short-term cultures are possible. |
