Originally, S. invicta was believed to be a red form of the black species S. saevissima richteri Forel. In 1972, Buren described the black imported fire ant to be a separate and distinct species, S. richteri Forel, and the RIFA was identified as S. invicta Buren (Hedges 1997).
Homologous recombination is a type of genetic recombination in which nucleotide (molecules which are joined make the structural units of RNA and DNA) sequences are exchanged between two similar or identical molecules of DNA.
It occurs frequently in many different cell types, and it has important implications for genomic integrity, evolution, and human disease. Aa Aa Aa. DNA recombination involves the exchange of genetic material either between multiple chromosomes or between different regions of the same chromosome.his process is generally mediated by homology; that is, homologous regions of chromosomes line up in preparation for exchange, and some degree of sequence identity is required. Various cases of nonhomologous recombination do exist, however.