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Lecture 27

BIOLOGY 1M03 Lecture Notes - Lecture 27: Gene Expression, Phenotype, Social FacilitationPremium


Department
Biology
Course Code
BIOLOGY 1M03
Professor
Jon Stone
Lecture
27

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BIOLOGY1M03Lecture27HumanofHumanBehavior
Questions:
● Whataspectsofhumanbehaviourareduetonaturalselection?
● Howaretheyselected?
● Howdoweknow?
● Howdogeneticandculturalevolutioninteract?
● Howdoesevolvedhumanbehaviourworkinamodernenvironment
ExtendedPhenotype:
● Humansareorganisms;behavioursareatrait.Thus,humanbehaviourcan
beevolved.
● Geneexpressiondependsonpersonalhistory(resultofneuralpathwaysand
learning)
○ Environmentalsoaffectsgeneexpressionfromasocial,cultural,and
biologicalpointofview.
● Humansarenottheonlyorganismswithcodedbehaviours.
● Variationcanbeduetosexes
BiologicalSubstratesofBehaviour:
● Ratscanlearnfromarbitrarycuesandstimuli.Thisisabiological
underpinning.Theyassociate,throughclassicalconditioning,smellswiththe
responsefromfood.
EnvironmentofEvolutionaryAdaptations:
● Organismsareadaptedtotheirancestors’environments.Thebetterone
performsinanenvironment,themoreoffspringtheywillpasson.Thus,one
willhaveitsparents’genes.
○ EnvironmentofEvolutionaryAdaptationistheenvironmentinwhich
anorganismisevolvedtosurvive(isadaptedto).
● Dowestillactlikehuntergatherers?
○ Theirenvironmentshadrestricteddiets,foodsharing,andsmall
groups.
■ Groupsaresmallerbecauseofresources
■ Humansaren’tusedtodealingwithstrangers
Skepticism:
● Evolutionarybiologistsanalysedromancenovels(forfemales),andfoundthat
manycontaindoctorsandcowboys.Theybelievethisisbecausetheyhave
manyresources,aremasculine,etc…
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