LIFESCI 2D03 Chapter Notes - Chapter 4: Arginine, Single-Nucleotide Polymorphism, Genetic Linkage

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Dog breeders use natural variation in behaviour to select dogs with appropriate traits to breed (artificial selection) Genes are not the sole determination of whether a behavioural trait will be present in an individual; the environment plays a large role as well. 4. 1 behavioural variation is associated with genetic variation. The search for a genetic basis of behaviour. Instinct: behaviours that are performed the same way each time, are fully expressed the first time they are exhibited, and are present even in individuals raised in isolation. Because all individuals in a species exhibit innate, non-learned behaviours, these behaviours must have a genetic basis and are heritable. Reflex: one kind of innate behaviour; an involuntary movement in response to a stimulus. Fixed action pattern: behaviours that are invariant and unlearned. Lay their eggs in nests on the ground, roll displaced eggs back into the nest using their beaks.

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