A researcher treats an early neural-tube-stage embryo with a 1-hour pulse of colchicine,which arrests proliferating cells in metaphase.Where will the arrested cells be found?

Question

Quizplus · Accepted Answer

The ventricular layer of the neural tube is where the cells are actively dividing during the early stages of embryonic development. Colchicine, which arrests cells in metaphase, would affect cells in this layer. The marginal and mantle layers are formed by cells that have migrated out of the ventricular layer, so they would not be affected by the treatment. The floor and roof plates are specialized regions of the neural tube that play important roles in development, but do not have a high concentration of proliferating cells.

A Researcher Treats an Early Neural-Tube-Stage Embryo with a 1-Hour