The universal genetic language of dna is common to virtually all organisms on earth. true or false

Prior to the development of dna fingerprinting, blood type could be used to determine possible parentage. although it might prove someone was not a parent, it could not show if someone was positively the parent, only that he or she might be a parent. which of the following is a true statement that can be made about parentage based on blood typing?

As a small change in a person's dna can cause a genetic disorder

Which description provides the best objective summary of the article in the passage?