MourningBands added 2 new photos. Honoring Those that Answered the Call. When people answer the call of public service with their lives, as far as I'm concerned, that's the gold standard. That was my thought when I brought these pieces together, and my thought each and every time one of them falls in the line of duty.
Best Answer: A mutation is a change in DNA. Genetic recombination can apply to two things: crossing-over between homologous chromosomes or recombining of traits when gametes fuse during fertilization. They all contribute to evolution because they result in a new organism with a new combination of characteristics. This new combination of characteristics is subjected to natural selection.
Recombination involves the cutting and covalent joining of DNA sequences. Recombination can occur between two different DNA molecules (intermolecular recombination) or between two regions of a single DNA molecule (intramolecular recombination). In most bacteria with a circular chromosome, such a recombination event would be lethal because the chromosome could not replicate properly and it would be ultimately degraded by DNA exonucleases. 2  Likewise, recombination between a linear DNA molecule and a circular plasmid would destroy the plasmid.