Cellular Structure and Function — Test

Question 9 • CMS 2026-2027 Biology CREDIT RECOVERY

How is mitochondrial DNA (mtDNA) typing used in forensic science?

Answer

A suspect’s nuclear DNA sample is matched to an unknown sample of mtDNA that was found at a crime scene.

A suspect’s mtDNA sample is matched to an unknown sample of mtDNA that was found at a crime scene.

A suspect’s nuclear DNA sample is matched to an unknown sample of nuclear DNA that was found at a crime scene.

A suspect’s mtDNA sample is matched to an unknown sample of nuclear DNA that was found at a crime scene.

Explanation

For mtDNA typing, investigators compare mitochondrial DNA from a suspect with mitochondrial DNA recovered from crime-scene evidence. The DNA types must match: nuclear DNA is analyzed separately and cannot be directly matched to an mtDNA sample. Therefore, the correct choice is the suspect’s mtDNA matched to an unknown mtDNA sample.

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