In eukaryotic cells, which statement best describes a key difference between nuclear DNA (nDNA) and mitochondrial DNA (mtDNA)?

• A. mtDNA is located in the nucleus and is replicated only during S phase, whereas nDNA is located in mitochondria and replicates continuously.
• B. mtDNA is typically inherited maternally and is usually circular, whereas nDNA is typically inherited from both parents and is organized as linear chromosomes.
• C. mtDNA is packaged into histones and contains most of the organism’s genes, whereas nDNA lacks histones and encodes only a few proteins.
• D. mtDNA undergoes meiotic recombination each generation at high rates, whereas nDNA does not recombine.

Answer: (B)