Gel electrophoresis results for hemoglobin types, used to identify sickle cell trait and disease in students.

Gel electrophoresis image showing seven lanes with DNA or protein bands, labeled with a key indicating different samples including sickle cell, sickle cell carrier, normal hemoglobin, and students. Lane 1 is sickle cell (marker), Lane 2 is sickle cell carrier (marker), Lane 3 is student 1, Lane 4 is student 2, Lane 5 is normal hemoglobin (marker), Lane 6 is student 3, and Lane 7 is student 4. The gel shows variations in band patterns corresponding to different genotypes.