Which of the following sources would likely have mitochondrial DNA but lack nuclear DNA?

A. Newly deceased victim
B. Biological fluids left at a crime scene
C. A single tooth found at a crime scene
D. Hair that has fallen from a suspect's head



Answer :

Final answer:

Mitochondrial DNA (mtDNA) is a unique genetic material passed down unchanged maternally, useful in genetic studies. Samples like a single tooth at a crime scene contain mtDNA but lack nuclear DNA.


Explanation:

Mitochondrial DNA (mtDNA) is a type of DNA found in the mitochondria that is passed down unchanged from the female genetic contributor to the child. It lacks recombination, making it a useful tool in genetic studies. Samples such as a single tooth found at a crime scene would likely contain mitochondrial DNA but lack nuclear DNA, providing valuable genetic information for analysis.


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