Which type of DNA would you prefer in a investigation: mitochondrional dna or nuclear dna? why?

Mitochondrial DNA

Explanation:

Mitochondria are cellular organelles that contain an extrachromosomal genome, which is both different and separate from the nuclear genome. Also, Mitochondrial DNA (mtDNA) presents several characteristics useful for forensic studies, especially related to the lack of recombination, to a high copy number, and to matrilineal (maternal) inheritance. mtDNA typing based on sequences of the control region or full genomic sequences analysis is used to analyze a variety of forensic samples such as old bones, teeth and hair, as well as other biological samples where the DNA content is low.

Sorry if this is confusing. I can clarify if you need me to.

chordata is the answer