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Chapter 4

Psych 1000: Chapter Four Notes (Definitions + Key Concepts)

6 Pages
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Department
Psychology
Course Code
Psychology 1000
Professor
Laura Fazakas- De Hoog

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Chapter Four
Genes, Evolution and Behavior
Adaptations
Products of natural selection – occur when organisms change (and adapt) according
to their environment, allowing them to survive through challenging environmental
situations; adaption’s have an increased reproductive ability when they allow an
organism a better chance of survival in their environment
Adoption Study
A method of research in behavioral studies where adoptive people are compared to
both their biological and adoptive parents in attempt to determine how strong of a
genetic component the characteristic might have
Alleles
An alternative form of genes which are responsible for the production of different
characteristics
Altruism
Occurs when an individual aids another individual, but in the process causes some
harm to themselves
Biologically Based Mechanisms
Mechanisms within an organism which first receive input from the environment, then
process the information and finally respond to it
Chromosome
A tightly coiled molecule made of DNA (deoxyribonucleic acid) that is partly covered
by protein; contains genes
Concordance
The likelihood that two people share a particular characteristic
Cooperation
Situations in which one individuals gains an advantage from helping another
individual
Domain-Specific Adaptations
Adaptations designed to solve a particular problem (ie. Selecting a suitable mate,
choosing safe foods to eat, avoiding certain environmental hazards, etc.); suggest
that the human mind is not a general (all purpose) problem solver – but rather a
collection of specialized independent modules evolved to handle specific adaptive
problems
Dominant Gene
The characteristic this gene controls will be displayed if paired up with a recessive
gene
Eugenics
The view which describes one group’s genes as superior to another
Evolution
A change over time in the frequency of genes/characteristics produced (in an
interbreeding species or organism)
Evolutionary Personality Theory
A theory which seeks to explain personality as a result of evolutionary history (ie.
Personality is thought to have developed its characteristics as a result of natural
selection)
Gene Knockout
A method of genetic engineering psychologists use to eliminate the function of a
gene in by altering that genes characteristics (using the aid of an inhibitory virus);
used to study behavior in mice after a virus (consisting of the gene infiltrator) infects
them
Genes
Located on chromosomes – the biological components/units of heredity
Genetic Deter minism
The view which holds genes have constant and unavoidable effects
Genotype
The genetic makeup of an individual
Heritability Coefficient
A statistic which ratios the extent to which variation of a particular characteristic
(within a population) can be linked to genetic factors
Kin Selection
A view which holds individuals are more likely to help those with similar genetics (ie.
Relatives, offspring, parents, etc.)
Monogamous Mating System
A mating system in which parents stay together with one another – just until their
offspring become self sufficient; (ie. “No divorce until child can provide for
themselves and doesn’t need us anymore”)
Natural Selection
“Survival of the Fittest (Genes)” – Genes observed to increase the likelihood of
survival of a particular species within a given environment are more likely to be
preserved by that species and therefore, become more common in that species
overtime
Parental Investment Theory
A theory which suggests the organism giving birth to offspring will be more “choosy”
when selecting their mate
Phenotype
The observable characteristics (ie. Hair color, skin color, eye color, body shape, etc.)
produced by the genotype
Polyandry
A mating system in which one female may mate with a number of males – found in
some fish, insect and bird species
Polygenic Transmission
When a number of gene pairs combine their influences to create a single phenotypic
trait
Polygynandry
(ie. Promiscuity) – a mating system where all members of a particular group can
mate with any other members of that particular group – found in some primate
groups such as chimpanzees and the bonobos
Polygyny

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Description
Chapter Four Genes, Evolution and Behavior Adaptations • Products of natural selection – occur when organisms change (and adapt) according to their environment, allowing them to survive through challenging environmental situations; adaption’s have an increased reproductive ability when they allow an organism a better chance of survival in their environment Adoption Study • A method of research in behavioral studies where adoptive people are compared to both their biological and adoptive parents in attempt to determine how strong of a genetic component the characteristic might have Alleles • An alternative form of genes which are responsible for the production of different characteristics Altruism • Occurs when an individual aids another individual, but in the process causes some harm to themselves Biologically Based Mechanisms • Mechanisms within an organism which first receive input from the environment, then process the information and finally respond to it Chromosome • A tightly coiled molecule made of DNA (deoxyribonucleic acid) that is partly covered by protein; contains genes Concordance • The likelihood that two people share a particular characteristic Cooperation • Situations in which one individuals gains an advantage from helping another individual Domain-Specific Adaptations • Adaptations designed to solve a particular problem (ie. Selecting a suitable mate, choosing safe foods to eat, avoiding certain environmental hazards, etc.); suggest that the human mind is not a general (all purpose) problem solver – but rather a collection of specialized independent modules evolved to handle specific adaptive problems Dominant Gene • The characteristic this gene controls will be displayed if paired up with a recessive gene Eugenics • The view which describes one group’s genes as superior to another Evolution • A change over time in the frequency of genes/characteristics produced (in an interbreeding species or organism) Evolutionary Personality Theory • A theory which seeks to explain personality as a result of evolutionary history (ie. Personality is thought to have developed its characteristics as a result of natural selection) Gene Knockout • A method of genetic engineering psychologists use to eliminate the function of a gene in by altering that genes characteristics (using the aid of an inhibitory virus); used to study behavior in mice after a virus (consisting of the gene infiltrator) infects them Genes • Located on chromosomes – the biological components/units of heredity Genetic Determinism • The view which holds genes have constant and unavoidable effects Genotype • The genetic makeup of an individual Heritability Coefficient • A statistic which ratios the extent to which variation of a particular characteristic (within a population) can be linked to genetic factors Kin Selection • A view which holds individuals are more likely to help those with similar genetics (ie. Relatives, offspring, parents, etc.) Monogamous Mating System • A mating system in which parents stay together with one another – just until their offspring become self sufficient; (ie. “No divorce until child can provide for themselves and doesn’t need us anymore”) Natural Selection • “Survival of the Fittest (Genes)” – Genes observed to increase the likelihood of survival of a particular species within a given environment are more likely to be preserved by that species and therefore, become more common in that species overtime Parental Investment Theory • A theory which suggests the organism giving birth to offspring will be more “choosy” when selecting their mate Phenotype • The observable characteristics (ie. Hair color, skin color, eye color, body shape, etc.) produced by the genotype Polyandry • A mating system in which one female may mate with a number of males – found in some fish, insect and bird species Polygenic Transmission • When a number of gene pairs combine their influences to create a single phenotypic trait Polygynandry • (ie. Promiscuity) – a mating system where all members of a particular group can mate with any other members of that particular group – found in some primate groups such as chimpanzees and the bonobos Polygyny • A mating system in which one male may mate with a number of females – a mammalian mating trait Reaction Range • Genetically influenced limits in which environmental factors can exert their effects on an organism; the range of possibilities (ie. Upper and lower limits) the genetic code allows (ex. Intelligence is not fixed at birth – an indiv
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