How is mitochondrial DNA (mtDNA) typing used in forensic science? A suspect’s mtDNA 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 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 nuclear DNA sample is matched to an unknown sample of mtDNA that was found at a crime scene

Explanation:

Mitochondrial DNA typing -

This method is mainly used by forensic scientist who investigate crime scenes.

It involves the use of DNA from an unknown sample to match a DNA collected from a crime scene.

This method is normally used in special scenarios.

These scenarios include:

1) When the DNA is discarded.

2) When the sample does not contain nuclear DNA.

From the description above we can now answer the question as follows:

an unknown nuclear mtDNA is matched to a nuclear mtDNA found at a crime scene.