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Chromosome Squashes

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Search words: mitosis, cell division, lab lesson plan, chromosomes

In this lab, we will grow onions, and use the cells from the root tip to make our chromosome squash slide. Cells in the root tip are rapidly dividing by mitosis in order to make the root grow in length.

Purpose: (1) To learn the technique of making chromosome squashes. (2) To observe chromosomes in recently living cells. (3) To determine if the rate of cell division correlates with the growth of the plant.

PLEASE NOTE: This lab is also sold in a bundled package which can be viewed here: Mitosis and Meiosis Complete Unit Plan

Your download will include Title, Purpose, Introduction, Materials, Safety Precautions, Procedure, Analysis Questions, Student Data Pages, Answers to all Questions, and Teacher Preparation Notes.

Materials: Onion sets, Toothpicks, Plastic cups, Razor blades, 70 % isopropyl alcohol, Test tubes, Rubber stoppers, Microscope slides, Cover slips, Microscopes, Syracuse dishes, Hydrochloric acid, 95% Ethyl alcohol, Carnoy's solution, Stopwatch, Aceto - orcein stain, Forceps

NOTE: This lab requires solutions that are potentially dangerous and must be handled with care.

You will receive both an editable Word document and a pdf form of the lab.

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Amy Brown - Science Stuff
K-12 Subject:
Grade Level(s):
Teaching Duration:
3 Days 
Type of Resource:
Answer Key:
N/A
# of Pages/Slides:
4
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Chromosome Squashes
Chromosome Squashes
Chromosome Squashes
Chromosome Squashes
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