Understanding how a disease begins and identifying irregularities require examining various levels of biological organization, including DNA, chromosomes, cells, tissues, organs, and joints. Below is a step-by-step overview: How the disease starts and identifying abnormalities: Step 1: Genetic & Chromosomal Abnormalities Chromosomes & DNA: Each human cell contains 23 pairs of chromosomes made up of … Continue reading The Detection and Repair Damaged of DNA