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Product 14749

By: The Flinn Staff

In the DNA Staining and Microscopy Laboratory Kit for biology and life science, grow your own onion root tips and follow a specific staining procedure that will make visible the DNA In the root tip cells.

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Students grow their own onion root tips and then follow a specific staining procedure that will allow them to see the DNA in the root tip cells. Students harvest root tips, treat them with chemicals, macerate the tissue, stain the tissue, and then prepare their own microscope slides. Microscopic examination of their prepared slides will reveal the DNA and mitotic patterns in the meristematic cells. The straightforward, classic squash-and-stain procedure utilized in this activity will help the abstract notion of DNA become a reality.Complete for 30 students working individually. Onion bulbs are required and available separately.

Correlation to Next Generation Science Standards (NGSS)

Science & Engineering Practices

Planning and carrying out investigations

Disciplinary Core Ideas

MS-LS1.A: Structure and Function
HS-LS1.A: Structure and Function
HS-LS1.B: Growth and Development of Organisms

Crosscutting Concepts

Structure and function
Patterns

Performance Expectations

MS-LS1-4. Use argument based on empirical evidence and scientific reasoning to support an explanation for how characteristic animal behaviors and specialized plant structures affect the probability of successful reproduction of animals and plants respectively