Final answer:
Genotyping helps separate a patient population with the same disease phenotype into two groups based on their genotypes. The differences in genetic variations identified through genotyping can be used as markers for susceptibility to the disease and for understanding the molecular pathways of the disease.
Step-by-step explanation:
In a patient population with the same disease phenotype, genotyping helps separate that population into two groups based on their genotypes.
Genotyping involves analyzing the DNA of individuals to identify differences in specific genetic variations, such as single nucleotide polymorphisms (SNPs), between the groups. These genetic differences can be used as markers for susceptibility to the disease and also provide insights into the molecular pathways of the disease.