Question

which best describes mitochondrial dna (mtdna)?
mitochondrial dna is the same as nuclear dna.
mitochondrial dna is inherited through the father.
mitochondrial dna can be traced for generations.
mitochondrial dna requires large amounts for testing.

Explanation:

Mitochondrial DNA is maternally - inherited and relatively stable, allowing it to be traced through generations. It is different from nuclear DNA. It is inherited from the mother, not the father, and modern techniques can analyze it even with small amounts.

Answer:

Mitochondrial DNA can be traced for generations.