Similarly , a few sperm , skin samples from under the fingernails , or a small amount of blood can provide enough DNA for conclusive analysis .
For example , a single human hair with attached hair follicle has enough DNA to conduct the analysis .
A few sperm , skin samples from under the fingernails , or a small amount of blood can provide enough DNA for conclusive analysis .
For example , a single human hair with attached hair follicle has enough DNA to conduct the analysis .