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Therefore, heritable differences in mental abilities may be caused by changes in the code describing the shape and operation of the underlying neural network. One significant expression of this idea is believed to be the many cognitive deficiencies seen in ADHD, making them ideal candidates for an endophenotype approach. [7]
Important clinical examples include the chance of offspring having a certain disease if the mother has it, if the father has it, or if both parents have it. Concordance among siblings is similarly of interest: what are the odds of a subsequent offspring having the disease if an older child does?
Autosomal traits are associated with a single gene on an autosome (non-sex chromosome)—they are called "dominant" because a single copy—inherited from either parent—is enough to cause this trait to appear. This often means that one of the parents must also have the same trait, unless it has arisen due to an unlikely new mutation.
However, some people tan more easily than others, due to differences in their genotype: [5] a striking example is people with the inherited trait of albinism, who do not tan at all and are very sensitive to sunburn. [6] Heritable traits are known to be passed from one generation to the next via DNA, a molecule that encodes genetic information. [2]
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The hypothesis seeks to explain the "hyperfocus" aspect of ADHD, the distractibility factor in ADHD, the short attention span individuals with ADHD have for subjects that do not interest them (which may or may not trigger hyperfocus), and various other characteristics related to ADHD (namely, hyperactivity and impulsivity). [2]
People with ADHD will often have a chronic history of having running to-do lists, with little success in getting the list done, consistently choosing fun over boring tasks, having actual ...
For humans, the Big Five personality traits, also known as the five-factor model (FFM) or the OCEAN model, is the prevailing model for personality traits. When factor analysis (a statistical technique) is applied to personality survey data, some words or questionnaire items used to describe aspects of personality are often applied to the same person.