mutations
mutation
small change in the DNA of a single gene
so after it changes it is called a gene
sickle-cell anemia.
Sickle Cell Anaemia is a single gene defect (Hb gene).
A mutagen could change a gene that tells a cell when to stop growing.
A mutation is a permanent change in the gene or chromosome of a cell that can result in altered characteristics or function. Mutations can arise spontaneously during cell division or in response to external factors such as radiation or chemicals. These changes can be inherited or occur randomly in somatic cells.
Smallest to largest: Gene (a place on a chromosome); chromosome (there are 46 in human cells); and DNA (because it accounts for all the genetic material in a cell).
b: the organism, but not its offspring
A change in the DNA of a gene is a mutation.
It is called gene replication or gene duplication.
The condition is called sickle cell trait. This occurs when an individual inherits one sickle cell gene and one normal hemoglobin gene, resulting in milder symptoms compared to sickle cell disease.