Figs. 307 & 308 from Don Fawcett's Chapter 12 (Centrioles). In interphase cells, microtubules commonly radiate from the centrosome, and in dividing cells the microtubules of the mitotic spindle conver...

Movie shows spindle assembly around DNA-beads in a Xenopus laevis egg extract. DNA beads are autofluorescent, and spindle is formed from exogenous X-rhodamine-labeled tubulin. By the end of the movie...

The events of meiosis I in a living insect spermatocyte beginning at metaphase with bivalents at the spindle equator, followed by anaphase onset, chromosome segregation and the start of cytokinesis. T...

The events of meiosis I and II in a living insect spermatocyte beginning with the breakdown of the nuclear envelope at diakinesis through to the completion of cytokinesis. Testes from the Crane fly N...

The events of meiosis I in a living insect spermatocyte beginning at metaphase with meiotic bivalents at the spindle equator followed by anaphase , segregation of bivalents to the spindle poles and t...

The events of meiosis I in a living insect spermatocyte beginning at metaphase with bivalents at the spindle equator, followed by anaphase onset, chromosome segregation and the start of cytokinesis. T...

The events of meiosis II in a living insect spermatocyte beginning at the completion of prophase II through the comletion of cytokinesis. Testes from the Crane fly Nephrotoma suturalis were observed w...

Mitotic spindle flattening. Compression elongates microtubule spindle. Widefield fluorescence images of Ptk2 cell expressing GFP tubulin flattened with a micromanipulator at 3:00-3:30 (min:s). Ima...

The events of meiosis I in a living insect spermatocyte beginning at diakinesis through telophase to the near completion of cytokinesis. Testes from the Crane fly Nephrotoma suturalis were observed wi...

The events of meiosis II in a living insect spermatocyte beginning at the completion of prophase II through the comletion of cytokinesis. Testes from the Crane fly Nephrotoma suturalis were observed w...