Yes, dead skin cells still contain DNA. Although these cells are no longer alive, they retain their genetic material. This DNA can be used for forensic analysis, like in Short Tandem Repeat (STR) analysis, which is commonly used to compare DNA profiles between samples.
Here's how it works:
- Dead skin cells are called corneocytes and are shed constantly from our bodies. These cells are small enough to become airborne and can be found in dust and other environments.
- DNA is present in the nucleus of cells, and even though the cells are dead, the DNA remains intact.
- Forensic scientists can extract and analyze the DNA from these dead cells to identify individuals or link them to crime scenes.
Therefore, dead skin cells can be a valuable source of DNA evidence, even though they are no longer alive.
