does semen contain DNA
Semen DNA analysis: The detection and investigation in a sample of semen. Let us assume that a man's semen is alleged to be on a piece of fabric. To learn whether the cloth is stained by the suspect's semen, DNA testing can be done.Here is how it works:1  First, it must be shown that the stain contains semen. 2  Semen glows under ultraviolet light and also changes color when exposed to specific chemicals.et us assume that a man's semen is alleged to be on a piece of fabric. To learn whether the cloth is stained by the suspect's semen, DNA testing can be done. Here is how it works: 1  First, it must be shown that the stain contains semen.