What is the difference between the genetic material on two sister chromatids and the genetic material on homologous chromosomes ?

sister chromatids carry identical genetic material, either from a maternal or paternal source, as they are intended to be perfect copies distributed into different daughter cells. Homologous chromosomes, on the other hand, contain both a paternal chromosomes and maternal chromosomes.

Explanation:

c.) polymerase chain reaction

- "unlike the original dna fingerprinting method, dna profiling does not use restriction enzymes to cut the dna. instead it uses the polymerase chain reaction (pcr)? to produce many copies of specific str sequences. pcr is an automated procedure that generates lots of copies of a specific sequence of dna."