Yes, ear wax contains DNA. Ear wax, also known as cerumen, is a natural substance produced by glands in the ear canal. It serves to protect the ear canal from foreign objects and infections. Ear wax contains cells, including dead skin cells, which contain DNA.
- Forensic Applications: Ear wax can be used as a source of DNA for forensic investigations, as it can be used to identify individuals. Studies have shown that human earwax can be a potential source of DNA evidence for human identification up to 30 days after collection.
- Genetic Ancestry: The type of earwax you have, either wet or dry, is determined by your genes. A change in a single nucleotide of your DNA can determine your earwax type, and this can be used to identify ancestry.
Therefore, earwax is a valuable source of DNA for various purposes.
