Answer:
The genes that Mendel observed affected a single characteristic in peas, however sickle cell anemia comes from pleiotropy, where a gene affects several characteristics.
Explanation:
Pleiotropy shows that the Mendelian idea that each gene affects only one trait is not always valid. For example, people with sickle cell anemia have deformed blood cells, oxygen deficit, damaged body organs and structures, however all these characteristics are affected by a single gene, a case of pleiotropy.
Sickle cell anemia is an inherited hematological (blood) disease that causes chronic destruction of red blood cells (erythrocytes, or erythrocytes) in the blood is very common in black people. To obtain a fully developed case of sickle cell anemia, a gene for the disease must be inherited from both parents.
