DNA detective
In this activity, students work through a series of slides to learn about the collection and processing of DNA evidence and use DNA profiling to solve a crime.
The activity provides experience with several of the science capabilities:
gather and interpret data
use evidence
critique evidence
interpret representations.
Crime scene DNA – slideshow
Use this slideshow to solve a crime, and to learn how the collection and processing of DNA evidence and DNA profiling are used to solve a crime.
Use the Slideshow menu for further options, including view full screen, and go here for the download option.
By the end of this activity, students should be able to:
describe where DNA is found in the body and how DNA may be ‘left behind’ at a crime scene
describe the basic structure of DNA
explain the process of DNA profiling.
Download the Word file (see link below) for:
introduction/background notes
what to do
teacher notes
Related content
Read these articles to learn more about DNA profiling and New Zealand’s DNA databank.
Find out more about teaching ethics.
Activity ideas
The Ethics thinking toolkit uses common ethical frameworks to help you explore ethical decision-making and judgements with your students. You may want to use a ‘consequentialism’ or ‘rights and responsibilities’ approach to explore the issue of a national DNA databank. If you register as a teacher, you can customise the tool to suit your ethical question and chosen approaches.
This activity helps students conceptualise DNA by extracting it from tomatoes.
Useful links
ESR (Institute of Environmental Science and Research) is the home of New Zealand forensic science. Visit their website for detailed information on DNA and forensic biology.
Visit the New Zealand Police website to find out more about their forensic services.
This RNZ audio looks at the false expectations and impression of forensic science created by TV dramas compared to reality.
The New Zealand Police Museum has some great forensic-related events. If you are in the Wellington area, check them out.
