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Like many other medical conditions, obesity is the result of an interplay between environmental and genetic factors. [2] [3] Studies have identified variants in several genes that may contribute to weight gain and body fat distribution, although only in a few cases are genes the primary cause of obesity.
Researchers suggest a few reasons for this: One is the "set point" theory, which posits that your body will fight to maintain the same weight through metabolic adaptations. These adaptations ...
Twin and adoption studies have provided much of the evidence for gene–environment correlations by demonstrating that putative environmental measures are heritable. [5] For example, studies of adult twins have shown that desirable and undesirable life events are moderately heritable as are specific life events and life circumstances, including divorce, the propensity to marry, marital quality ...
Negative environmental influences may block the predisposition (ability) one has to do some things. Behaviors displayed by animals can be influenced by genetic predispositions. Genetic predisposition towards certain human behaviors is scientifically investigated by attempts to identify patterns of human behavior that seem to be invariant over ...
Genetic correlations are scientifically useful because genetic correlations can be analyzed over time within an individual longitudinally [41] (e.g. intelligence is stable over a lifetime, due to the same genetic influences – childhood genetically correlates = with old age [42]), or across diagnoses, allowing discovery of whether different ...
What are the pros and cons of viewing the individual or the gene as the main unit of selection? Outline the evolutionary argument for senescence. What are the evolutionary costs and benefits of sex. Dawkins, Chapter 4. How do genes influence behavior? How do honeybees vary in foulbrood susceptibility?
Many of us believe we are masters of own destiny, but new research is revealing the extent to which our behavior is influenced by our genes. It’s now possible to decipher our individual genetic ...
To support the hypothesis that core genes play a smaller than expected role, the authors describe three main observations: the heritability for complex traits is spread broadly, often uniformly, across the genome; genetic effects do not appear to be mediated by cell-type specific function; and genes in the relevant functional categories only ...