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Why is the root important in DNA isolation from hair sample?

Answer and explanation

Correct answer: The root may contain living cells and DNA

Cells attached to the hair root may be living or recently living and can contain nuclear DNA. In contrast, the hair shaft is mainly made of keratinised dead cells, so it may contain very little or degraded nuclear DNA. Therefore, a hair with its root attached is more useful for DNA isolation. Exam tip: In forensic DNA questions, remember that the hair root can be a source of nuclear DNA.

Related tags

Dna IsolationHair RootNuclear DnaForensic BiologyRecombinant Dna TechnologyIsolation Of DnaProcesses Of Recombinant Dna TechnologyBiotechnology

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