BIOLOGY 1M03 Lecture Notes - Lecture 1: Sensory Cue, Fixed Action Pattern, Haplodiploidy

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Evidence for genetic influence on behaviour & causation of behaviour. Proximate: the immediate sequence of physiological effects that leads to the behaviour (how something reacts) i. e. how does a frog know you"re coming. Ultimate: the adaptive value or evolution of the observed behave (why) Basis of behaviour: environmental (learned) or genetic or combo of both: this is a continuum, will have both learned and genetic aspect of it, it is epigenetic. Evidence for a genetic component of behaviour. 1) deprivation experiments: prevent learning opportunities through isolation of subject. Squirrels bury nuts (will bury nuts when no other squirrels around) Spider web spinning (never see other spider weaving web) Kangaroo rat (jump up and away from predators without learning this from someone) Fixed action pattern: pattern that appears essential complete and is played out to completion once active by a simple sensory cue. Sensory cue (sign stimulus: external stimulus that triggers fap) (releaser: evoke negative response)

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