DNA Fingerprinting Notes Flashcard

Front

What is the term for a variant form of a gene?

Back

Allele

Front

What is the primary reason a law-enforcement officer takes precautions when collecting DNA evidence?

Back

To avoid contamination

Front

Describe the use of DNA profiling using mtDNA and Y STRs to help identify a person using the DNA of family members.

Back

mtDNA is used for maternal lineage, Y STRs for paternal lineage

Front

STRs can be more easily recovered from ______.

Back

often degraded and limited quantities of DNA

Front

A law-enforcement officer is collecting DNA evidence. What precaution is he likely taking to avoid contamination? Fill in the blank: The officer is likely ________ to avoid contamination.

Back

Wearing gloves

Front

What is DNA fingerprinting?

Back

A technique used to identify individuals based on their unique DNA profiles.

Front

What role do short tandem repeats (STRs) play in DNA profiling?

Back

STRs are used as markers to compare DNA samples for identification.

Front

What is mitochondrial DNA (mtDNA)?

Back

DNA located in the mitochondria, inherited maternally, used for tracing maternal lineage.

Front

What is the significance of Y-chromosome STRs in forensic analysis?

Back

Y STRs are used to trace paternal lineage and are useful in male-specific DNA profiling.

Front

How can contamination affect DNA evidence collection?

Back

Contamination can lead to inaccurate results, making it difficult to identify the true source of the DNA.