Question

The number of repeats of each individual's tandem repeated regions can be different creating a specific DNA profile. When using one primer pair in different individuals, what does the PCR describe?

1) The number of repeats of each individual's tandem repeated regions
2) The specific DNA profile
3) The primer pair
4) The PCR product

Answer 1

PCR describes the amplification of specific regions of DNA using one primer pair in different individuals. This amplification creates a unique DNA profile based on the number of repeats of each individual's short tandem repeats (STRs).

Step-by-step explanation:

The polymerase chain reaction (PCR) is a technique used to rapidly increase the number of copies of specific regions of DNA. When using one primer pair in different individuals, PCR describes the amplification of those specific regions of DNA. These regions, known as short tandem repeats (STRs), are highly variable in sequence and can create a unique DNA profile for each individual.