The Effects Of Intelligence On The Human Population Essay

1280 Words Aug 26th, 2014 6 Pages
It seems as though humans have always been fascinated with how the brain works and how well we are able to process information and for good reason too. Higher intelligence has been found to be associated with greater success in both academia and work, and may even have links to health and longevity. One particular area of interest within this subject is the heritability of intelligence. This is essentially an estimation of how much genetic variance can account for the variations of cognition that are observed in the human population (Plomin et al, 2013). Over the years, we have in some ways learned an immense amount about intelligence, yet when reading even the most recent reports it appears that we know hardly anything at all. One thing that most scientists can agree upon, is that fact that intelligence is a polygenic trait. This has been shown repeatedly in studies relating genetics to intelligence and the biggest questions now are what genes these are and how exactly do they work. Once we know this, we will be one step closer to discovering just how big of a role genetic variance plays in the heritability of intelligence. Many sources suggest that the heritability ranges from about 40% in childhood to about 80% in adults (Gosso et al. 2006; Dick et al. 2007; Posthuma and E.J.C Geus, 2006). Although this phenomenon is not yet fully understood, it is believed that this increase over a person’s lifetime is due to both the development of the brain (and thus the expression of…

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