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Cytogenetics: mitosis in the meristem of jonquil root tips

Posted on Mar 10 2011 by Tania Blanksby

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Tags: asell biology, genetics, plant biology

Experiment Overview

Students are able to observe the stages of mitosis under a compound microscope by preparing squashes of onion or jonquil root tips and staining with aceto-carmine. Students are to produce labelled diagrams of examples of each phase of mitosis from their preparation.

tudents also estimate the relative length of time of each phase of the cell cycle by recording the frequency with which they find each phase in regions where cell division is actively taking place. The frequency of a phase is an indication of the relative length of that phase. The cell cycles for onion and jonquil are about 16 hours.

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