Face Book Alert Pay OdeskEvolution, selection, adaptation- these nearly similar terms may lead someone into confusion. But the thing, what can be extracted, common from all these terms is the genetic sequence change or mutations over time. These alterations do matter a lot and these account for many of our interactions. MHC genes (Major Histocompatibility Complex), a cluster of genes that plays a major role in the immune system, are a very good target for accounting the genetic diversity. Genetic diversity has been linked to fitness and reproductive success in general, and genetic diversity within the MHCs has been linked to immunocompetence and mate preferences. Hanne C. Lie et al; has performed a study published online in October 2008 issue of Evolution. They have photographed and genotyped 160 participants using microsatellite markers, one class of repeating sequences in DNA, situated within and outside the MHC, and calculated genetic diversity and found MHC heterozygosity, different gene sequences responsible for the same trait, is associated with male attractiveness and specifically facial averageness, with averageness mediating the MHC-attractiveness relationship. In fact, females and males both show tendency to be attracted by facial cues written in their MHCs and some non-MHC sites.
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