Respuesta :
not enough DNA, starts to break down when exposed to environmental factors like change in temperature
Answer:
There can be many challenges while collecting DNA from the cells that is found at the crime scene.
One of the main problem is the minute amount or less amount of DNA that is found at the time of crime scene. this small amount is not sufficient for the reactions that is carried out.
Even PCR needs a detectable amount of DNA for the reactions to take place. The DNA that is found is contaminated most of the time. It is made of protein which gets denatured and then it becomes useless.
