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The way that physical and behavioural traits and characteristics are passed from biological parents to offspring through the mixing and recombination of genetic material that occurs at fertilisation.
Heritability is the extent to which a condition or feature can be attributed to genetic influences. If a condition is highly heritable, it means, for instance, that parents may pass on to their children genetic variants linked to heightened risk of developing autism. Genetic variants linked to autism may also arise afresh (through new mutations) without being inherited from parents.
A term used by some specialists to describe cases of autism where the individuals’ full-scale IQ scores are above 70. This is not a formal diagnostic category, but rather a term sometimes used informally in diagnosis, as well as in everyday situations and research. It has sometimes been used interchangeably with Asperger syndrome. The overlap between the two meanings has been questioned, and 'high-functioning' may also give the misleading impression that an able person's experience of autism is mild and not disabling. See also low-functioning.
A group of chemical substances that play a major role in transmitting signals around the body, helping to regulate physiological activities such as digestion and respiration, and psychological states such as stress, mood and social bonding.