Final answer:
Researchers use both healthy individuals and those with the genetic disease to compare genetic makeup and determine the mutation causing the disease. This helps understand the disease's genetic basis and develop targeted therapies.
Step-by-step explanation:
Researchers studying a genetic disease use DNA sequences from both healthy people and individuals suffering from the disease to compare the genetic makeup.
By comparing the two groups, researchers can determine if the disease is caused by the same mutation in the single gene. This helps in understanding the genetic basis of the disease and can lead to the development of targeted therapies.
Additionally, studying both groups allows researchers to investigate the impact of the disease on a person's lifestyle and make informed decisions about their healthcare.