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Core practical 3: Observe mitosis in root tips

EDEXCEL Biology B Teacher Resource Pack 1 Pearson Education Ltd 2015 This document may have been altered from the original 1 Core practical 3 Teacher sheet Observe mitosis in root tips practical activities have been safety checked but not trialled by CLEAPSS. Users may need to adapt the risk assessment information to local circumstances. Core practical 3: Observe mitosis in root tips Objectives Know how to prepare a temporary slide of a root tip to Observe mitosis Recognise the stages of mitosis in dividing cells Identify hazards, associated risks and control measures for the procedure Safety Specification links Eye protection must be worn.

Fill a small bottle with 1 mol dm−3 hydrochloric acid, and place it in a thermostatically controlled water bath set at 55 °C. Leave the bottle for 15 minutes to let the acid warm to the temperature of the water bath. 2. ... chromosomes dark red and fix the cells, stopping mitosis.

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