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Lecture 3

Lecture 3 - Extremely Detailed/ Thorough Note

3 Pages
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Department
Psychology
Course Code
PSYB30H3
Professor
Marc A Fournier

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PSYB30 – Lecture 3 – Chapter 2
Evolutionary Process: 3 Basic Elements
Variation – Idea that we differ in our design features (variation in design)
We come into our world differently physically and psychologically
Inheritance – Design features are inheritable, some design features are
inheritable
Selection – Design features, to a greater or lesser extent, can influence our
abilities to survive & reproduce
If design feature is heritable & contributes to survival &
reproductive success, trait will appear in increasing frequency
across generations
Traits that are inheritable & positively impact survival &
reproduction, get passed on at greater rates, than alternative design
features, and propagate amongst the species
If pressures/environmental challenges remain same over long
enough period of time, traits that equip organisms to survive &
reproduce best, will become so frequent in the population that trait
will become typical amongst the species as a whole
Evolutionary Processes
Natural Selection – Evolution of adaptive characteristics because of the survival
benefits bestowed on those having them (giraffe Neck)
Key element is that trait/design feature in question is contributing
to survival of organism
Sexual Selection – Evolution of adaptive characteristics because of the
reproductive benefits bestowed on those having them
Intrasexual Competition (Same Sex Competition) – Members of
one sex will compete for preferential or priority of access of
members of the opposite sex
oTraits/design features/attributes which enable the
males of a species to compete successfully against
other males, will ensure that the male reproduces
successfully (Deer fighting for Do’s)
www.notesolution.com

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Description
PSYB30 Lecture 3 Chapter 2 Evolutionary Process: 3 Basic Elements Variation Idea that we differ in our design features (variation in design) We come into our world differently physically and psychologically Inheritance Design features are inheritable, some design features are inheritable Selection Design features, to a greater or lesser extent, can influence our abilities to survive & reproduce If design feature is heritable & contributes to survival & reproductive success, trait will appear in increasing frequency across generations Traits that are inheritable & positively impact survival & reproduction, get passed on at greater rates, than alternative design features, and propagate amongst the species If pressuresenvironmental challenges remain same over long enough period of time, traits that equip organisms to survive & reproduce best, will become so f
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