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 (mtDNA) is maternally - inherited and can be traced through generations as it is passed down from mother to offspring relatively unchanged. Nuclear DNA is different from mtDNA. MtDNA is inherited through the mother, not the father. Also, mtDNA analysis can be done with small amounts of sample.

Answer:

Mitochondrial DNA can be traced for generations.