Sometimes, individual Genes, pieces of Chromosomes, entire Chromosomes, or entire Genomes can be duplicated. Once a Gene is duplicated, there are three possible pathways:
Both copies may remain functional and continue to produce identical Gene products. NaturalSelection favors multiple copies of a Gene when large amounts of the Gene product are required.
- One copy of the gene can retain its original function and the other can accumulate mutations, degenerate, and ultimately become nonfunctional.
- The most interesting from an evolutionary point of view : One copy of a newly duplicated gene may maintain its original function, and the other may evolve to acquire a new function.
E.g. Globin gene
AnswerMe : In case 1, do these two genes have same name or different name? --yong27, 2004-10-09