Question

how is mitochondrial dna (mtdna) typing used in forensic science?
a suspects mtdna sample is matched to an unknown sample of nuclear dna that was found at a crime scene.
a suspects mtdna sample is matched to an unknown sample of mtdna that was found at a crime scene.
a suspects nuclear dna sample is matched to an unknown sample of nuclear dna that was found at a crime scene.
a suspects nuclear dna sample is matched to an unknown sample of mtdna that was found at a crime scene.

Explanation:

In forensic science, mitochondrial DNA (mtDNA) typing involves matching a suspect's mtDNA sample to an unknown mtDNA sample from a crime - scene. MtDNA is distinct from nuclear DNA. MtDNA typing specifically focuses on mtDNA samples for identification purposes.

Answer:

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