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High heritability of a trait, consequently, does not necessarily mean that the trait is not very susceptible to environmental influences. [8] Heritability can also change as a result of changes in the environment, migration, inbreeding, or how heritability itself is measured in the population under study. [9]
A high heritability of a trait does not mean that environmental effects such as learning are not involved. Vocabulary size, for example, is very substantially heritable (and highly correlated with general intelligence) although every word in an individual's vocabulary is learned.
While the heritability is very high, no specific genes have been conclusively associated with bipolar, and a number of hypotheses have been posited to explain this fact. "The polygenic common rare variant" hypothesis suggests that a large number of risk conferring genes are carried in a population, and that a disease manifests when a person has ...
Attention deficit hyperactivity disorder (ADHD) [1] is a neurodevelopmental disorder characterized by executive dysfunction occasioning symptoms of inattention, hyperactivity, impulsivity and emotional dysregulation that are excessive and pervasive, impairing in multiple contexts, and developmentally-inappropriate.
A study on a large group of children found more than 60% heritability for callous-unemotional traits and that conduct problems among children with these traits had a higher heritability than among children without these traits. [13] [14] The study also found slight sex differences (boys 64%, girls 49%) in the affective-interpersonal factor. [14]
When behavioural genetics researchers say that a behaviour is X% heritable, that does not mean that genetics causes, determines, or fixes up to X% of the behaviour. Instead, heritability is a statement about genetic differences correlated with trait differences on the population level. [citation needed]
Nearly 90% of adults over age 20 in the United States are at risk of developing heart disease, an alarming new study suggests.. While the unexpectedly high number doesn't mean that the majority of ...
Schizophrenia has been considered an evolutionary puzzle due to the combination of high aggregate heritability, relatively high prevalence (~1%), and reduced reproductive success. One explanation could be increased reproductive success by close relatives without symptoms but this explanation seems unlikely.