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Populations Study Guide (Ch 21-23)
Concepts
□ I can describe the Hardy-Weinberg Principle and explain its importance to
population gene-pool stability and the significance of non-equilibrium values
(21.1)
□ I can describe the factors that cause the gene pool diversity to change (21.2)
-
Genetic drift, gene flow, non-random mating, bottleneck effect, migration,
mutation, natural selection, and founder effect
□ I can apply quantitatively the Hardy-Weinberg Principle to observed and
published data to determine allele and genotype frequencies (21.1)
□ I can describe the molecular basis of gene-pool change and the significance of
these changes over time (21.2)
- Mutations and natural selections
□ I can describe and explain, quantitatively, factors that influence population growth
(22.2)
□ I can describe the growth of populations in terms of the mathematical relationship
among carrying capacity, biotic potential, environmental resistance, and the
number of individuals in the population (22.1, 22.2)
□ I can explain the different population growth patterns (22.2)
-
J and S curves
□ I can describe the characteristics and reproductive strategies of r-selected and Kselected organisms (22.3)
□ I can describe the basis of species interactions and symbiotic relationships and
their influences on population changes (23.1)
□ I can explain the role of defence mechanisms in predation and competition as
caused by genetic variation (23.1)
□ I can explain how mixtures of populations that define communities may change
over time or remain as a climax community
- Primary and secondary succession
Formulas
p  q 1
ΔN = (natality (n) + immigration (i)) – (death (d) + emigration (e))
p 2  2 pq  q 2  1
gr =
D
N
A /V
N
t
cgr 
N
N
Vocabulary
Allele Frequency
Immigration
Density Dependent Factor
Fixed Frequency
Emigration
Density Independent
Genetic Drift
N
Factor
Founder Effect
ΔN
Intraspecific Competition
Bottleneck Effect
Growth Rate (gr)
Interspecific Competition
Gene Flow
Per Capita Growth Rate
Predation
Sexual Selection
(cgr)
K-selected Organism
Sexual Dimorphism
Open Population
r-selected Organism
Population Size
Closed Population
Symbiosis
Population Density
Exponential Growth
Mutualism
Ecological Density
r
Commensalism
Population Dispersion
Environmental Resistance
Parasitism
Clumped Dispersion
Logistic Growth
Succession
Uniform Dispersion
Lag Phase
Climax Community
Random Dispersion
Log Phase
Primary Succession
Natality
Stationary Phase
Secondary Succession
Mortality
K
Pioneer Community