ABO (ABO Blood Group System): The ABO gene is responsible for determining the ABO blood group of an individual. It encodes enzymes that modify the structure of glycoproteins and glycolipids on the surface of red blood cells, resulting in different blood types (A, B, AB, and O). Variations in this gene are not only crucial for blood transfusion compatibility but also have been associated with various diseases, including cardiovascular diseases and certain types of cancer....