Reflection: Student Self-Assessment DNA Extraction Lab (Day #1 of 2) - Section 4: Closure: What did we learn? Where do we go from here?


For me, the biggest reason to have students do this lab is to see how simple it can be to extract DNA and to see it up close and personal. In the age of forensic science, nearly all body fluids, tissues contains DNA! In addition, understanding the solubility of the membranes (plasma and nuclear) in the detergent and the insolubility of DNA in alcohol links back to Unit #2 from a structure and function perspective.

Here two students note that:

"The DNA was jiggle-ly. It was on top of the alcohol. It look murky white. The alcohol layer was mainly transparent."

Question: "What is most memorable about this procedure and what you observed?"

Answer: "How the salt-water tasted and seeing the DNA jiggle."

Question: "How does this lab connect back to either the Essential Question or (7) Enduring
Understandings for this Unit?"

Answer: “Genetic material can be transferred from one organism to another by the tools of biotechnology. This lab connects back to this because it shows how easily DNA can be extracted."

Pretty cool takeaways, huh?

  It's that easy? DNA Extraction
  Student Self-Assessment: It's that easy? DNA Extraction
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DNA Extraction Lab (Day #1 of 2)

Unit 3: 4) DNA & RNA ("Instructions for Life")
Lesson 1 of 10

Objective: Students will create and carry out a plan to extract DNA from human saliva (i.e. cheek cells).

Big Idea: All cells contain genetic information in the form of DNA and this incredibly small molecule can be observed before your very eyes! Simply too cool...

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