Introduction
DNA profiling is a powerful tool used in forensic science to identify individuals and solve crimes. It involves analyzing specific regions of an individual's DNA to create a unique profile that can be used to match with other DNA samples. The DNA profiling Gizmo is an interactive tool that allows students to explore the principles of DNA profiling and its applications in forensic science. In this article, we will provide an answer key for the DNA profiling Gizmo student exploration worksheet.
Part 1: DNA Extraction
The first part of the DNA profiling Gizmo involves extracting DNA from different sources, including hair, blood, and saliva. Students will learn about the different methods used to extract DNA and the importance of maintaining the integrity of the DNA sample. The key to successful DNA profiling is obtaining a high-quality DNA sample.
Part 2: PCR Amplification
The second part of the DNA profiling Gizmo involves amplifying specific regions of DNA using the polymerase chain reaction (PCR). Students will learn about the steps involved in PCR amplification and how it can be used to create millions of copies of a specific DNA region. The more copies of the DNA region, the easier it is to analyze and create a DNA profile.
Part 3: Gel Electrophoresis
The third part of the DNA profiling Gizmo involves analyzing the amplified DNA fragments using gel electrophoresis. Students will learn about the principles of gel electrophoresis and how it can be used to separate DNA fragments based on their size. The DNA fragments are then visualized using a stain, and the resulting DNA profile can be compared to other DNA samples.
Part 4: DNA Profiling
The final part of the DNA profiling Gizmo involves comparing DNA profiles from different individuals and determining whether they match. Students will learn about the principles of DNA matching and how it can be used to identify individuals in forensic investigations. The DNA profiling Gizmo also allows students to explore different scenarios and determine the likelihood of a match based on the DNA profiles.
Conclusion
The DNA profiling Gizmo is an excellent tool for students to explore the principles of DNA profiling and its applications in forensic science. By completing the student exploration worksheet and using this answer key, students can gain a better understanding of the different steps involved in DNA profiling and how it can be used to solve crimes. With advances in technology, DNA profiling is becoming an increasingly important tool in forensic investigations, and it is essential for students to understand its principles and applications.
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