The roots of the HGP can be traced back to the atomic bomb era that began during World War II. Descendants of bomb survivors harbor DNA mutations as a result of severe radiation exposure. These mutations were passed to their descendents who developed horrible diseases and malformations. The DOE’s role in the HGP arose to study the genetic and health effects or potential health risks of radiation and chemical by-products of energy production. Scientist

Damaged or mutated DNA are heritable changes that may result from uncorrected errors in replication, failure to repair damage correctly, or from spontaneous rearrangements. A mutation is a permanent change in the bases that make up a gene. Since the bases constitute the code letters, which direct what amino acids are incorporated in to a protein, changes in the bases of DNA often result in substantial changes of protein function.

While mapping chromosomes, scientists use markers to locate different genes. To figure out what chromosome the gene is on, probes highlight the chromosome and the general location of the gene. Then, scientists cut out pieces of the chromosome with special enzymes. With these pieces, scientists clone hundreds of copies of these fragments and sequence the DNA to find recognizable DNA markers and look for places where the fragments share some of the same markers. When researchers wish to sequence a fragment, they run four nearly identical reactions using that DNA as a template, in which the four bases are labeled with different fluorescent dyes.

Some topics in this essay:
Facility PSF, Steps Knowing, Watson Crick, Replication DNA, Genome Center, Biology Genetic, Mutations Damaged, Genes DNA, II Descendants, Genome Project, human genome, base pairs, genetic information, pairs chromosomes, strand dna, dna sequencing, strands dna, small-scale sequencing errors, sugar-phosphate backbone, bases dna, dna template, large-scale structural errors, 4 produce base, genetic information dna, produce base pairs,