Final answer:
Abnormal red blood cells are produced due to mutations in the genes involved in hemoglobin synthesis. Examples of genetic disorders causing abnormal red blood cells include sickle cell anemia and thalassemia.
Step-by-step explanation:
Abnormal red blood cells are produced due to mutations in the genes involved in hemoglobin synthesis. One example of a genetic disorder resulting in abnormal red blood cells is sickle cell anemia, which is caused by a mutation in the gene for beta-hemoglobin. This mutation changes a single amino acid in the protein, leading to the formation of sickle-shaped red blood cells. Another example is thalassemia, an inherited blood disorder that affects the maturation of red blood cells and the formation of hemoglobin.