Cells have a number of repair mechanisms to fix mutations in DNA. If a cell’s DNA is completely broken and cannot be repaired, the cell is prone to be prevented from dividing.
This mutation causes the hemoglobin in pink blood cells to distort to a sickle shape when deoxygenated. The sickle-formed blood cells clog in the capillaries, cutting off circulation. These are the sickle-shaped blood cells of someone with sickle cell anemia, a genetic disease common among those of African descent.
If one or two bases are deleted the translational frame is altered resulting in a garbled message and nonfunctional product. A deletion of three or extra bases go away the studying frame intact.
A basic genetic difference between organisms is whether their cells carry a single set of chromosomes or two copies of each chromosome. The former are referred to as haploid; the latter, as diploid.
Having two copies … Read MoreRead More »