DNA Fingerprinting Worksheet
Explore the principles and applications of DNA fingerprinting with this Grade 9 science worksheet.
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DNA Fingerprinting Worksheet
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Read each question carefully and provide your best answer. Refer to your notes or textbook if needed.
1. DNA fingerprinting is also known as DNA .
2. The process used to separate DNA fragments by size is called .
3. Short tandem repeats (STRs) are sections of DNA that are highly variable among individuals.
4. The probability of two individuals having the exact same DNA fingerprint (excluding identical twins) is extremely .
5. Which of the following is NOT a common application of DNA fingerprinting?
Paternity testing
Identifying victims of disaster
Predicting future lottery numbers
Forensic investigations
6. What is the primary characteristic of DNA that allows for 'fingerprinting'?
Its double helix structure
Its ability to replicate
Its unique sequences and varying lengths of non-coding regions
Its sugar-phosphate backbone
7. Briefly describe the main steps involved in creating a DNA fingerprint.
8. Examine the DNA fingerprinting gel below. Which suspect's DNA matches the crime scene sample?
9. Identical twins have different DNA fingerprints.
True
False
10. DNA can be extracted from various sources, including blood, saliva, and hair.
True
False
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