Essay on genetic mutations
A genetic mutation is a permanent change in the sequence of the DNA that makes up a gene. A mutation of these sorts can be caused by either inheritance from the parent or caused sometime during the life of someone. The mutation that has been inherited is called a germline mutation. Germline mutations affect virtually the entire body, and they seem to be present in every cell. A somatic mutation, or one that is caused in the DNA of a single cell sometime during the life, can be caused by an environmental factor or a wrong bonding in the DNA molecule. These cannot be passed down to the next generation of children because they occur in a specific cell as opposed to in a reproductive cell. Some mutations occur …show more content…
Diseases Caused by Genetic Mutations A morphological mutation is one that affects the physical appearance of the mutant. A restrictive condition is one that requires a certain environment to make the mutation become visible and effective. Lethal mutations also may occur. These mutations cause death among the individual, hence the phrase, “lethal mutation”. The death can occur either before or after the birth of the individual (McClean, 1999).
Craig Raine said in his book Heartbreak,
Begin with the soft smelted upturned heart-shaped mouth made for smiling a smile kept for kindness, tenderness, incapable of malice. Am I going too fast for you? But the face is streamlined. Neither clipped nor curt. An aerodynamic design. The almond eyes see out through their sleepy epicanthic fold. Trusting and calm, if a flicker from slowness, a further flicker from stupidity. Settled in slow-motion beauty, heart-breaking beauty. (2010)
Down syndrome, also called Trisomy 21, is condition in which a person has developed a third twenty-first chromosome.