-A curious adult from British Columbia, Canada
May 25, 2004
The short answer is that it is possible to determine paternity without the father. You are right that the way it is done without the father is to use other relatives. Aunts, uncles, cousins, siblings and grandparents can all be used.
Everyone, except identical twins, has a unique set of DNA. DNA is made up of 4 bases or letters, A, C, G, and T. These 4 letters form the written code that makes up the DNA sequence.