GIZMO DNA Profiling.pdf Gizmo Student Exploration VERIFIED ANSWERS 100% CORRECT

Vocabulary : DNA polymerase, DNA profiling, gel electrophoresis, gene, mutation, non-coding
region, polymerase chain reaction, primer, short tandem repeat
Prior Knowledge Questions (Do these BEFORE using the Gizmo.)
In 1985, Darryl Hunt was convicted of murder. While Hunt was in jail, a new method for
analyzing DNA evidence was invented. The DNA evidence on the victim did not match Hunt’s
DNA but did match that of another prisoner. After 19 years spent behind bars, Hunt was finally
declared innocent and released from prison in 2004.
1. DNA is used to tell people apart. What aspects of DNA do you think make this
possible?
- The lengths of the repeated sequences in DNA
- The DNA sequences themselves
2. What are some possible uses for technology that can identify people based on their
DNA?
- Gel electrophoresis
Gizmo Warm-up
DNA profiling does not just compare people’s entire genome side
by side. Instead, a very particular part of the DNA is compared. In
the DNA Profiling Gizmo you will learn about the differences in
DNA that make DNA profiling possible and you will use that
knowledge to design your own DNA profiling test.
Click on the crime lab in the Forensic training section. You are looking at a strand of DNA. DNA
contains genes and non-coding regions between genes. Click on Non-coding A.
1. You are looking at a portion of the non-coding A section for three different people.
Are these sections the same or different? Explain.
- The sections are different. Person 1 has the longest section, person 3 has the
second-longest section and person 2 has the shortest section.
a. Click Previous then click on Gene A. Are there differences in gene A for the three
people?