©EVERLY 2025 ALL RIGHTS RESERVED
Bio 152 Exam Questions And Answers 100%
Pass
What are the 4 Mechanisms of Evolution? - ANS 1. Natural Selection
2. Gene Flow
3. Genetic Drift
4. Mutation
What is genetic drift? - ANS Any change in allele frequency in a population due to chance
What is genetic bottleneck? - ANS Sudden and drastic reduction in the number of individuals
in a population
What is the founder effect? - ANS Chance "change" in allele frequencies that occurs when a
subset of a large population establishes a new population
Can genetic drift cause a strong evolutionary change? - ANS Yes, because change can occur
over time
What is gene flow? - ANS Movement in alleles between populations
What can gene flow do? - ANS 1. Gene flow IN can ADD alleles
2. Gene flow OUT can REMOVE alleles
, ©EVERLY 2025 ALL RIGHTS RESERVED
Can gene flow cause strong evolutionary change? - ANS Yes, if there's a lot of it
What is a mutation? - ANS A change in the heredity material of an organism
What is point mutation? - ANS When there is a mutation in the gene of a parent
Can mutation cause evolutionary change? - ANS Yes, because it can add new alleles
What is sexual selection? - ANS a type of natural selection that operates among individuals
of the same gender
What are the conditions of natural selection? - ANS 1. individuals must vary in traits
2. some of these traits differences are heritable
3. only some individuals survive to reproduce and/or survivors produce different numbers of
surviving offspring
4. Some heritable traits have better survival and reproduction than other traits (success is NOT
random)
What is the Theory of Evolution by Natural Selection? - ANS All species are related by a
common ancestry and the characteristics of species can be modified from generation to
generation in response to natural selection
What is a theory? - ANS One or more hypotheses about a broad class of observant tested by
many, many studies and always supported
What is a hypotheses? - ANS Proposed explanations for a set of observations
Bio 152 Exam Questions And Answers 100%
Pass
What are the 4 Mechanisms of Evolution? - ANS 1. Natural Selection
2. Gene Flow
3. Genetic Drift
4. Mutation
What is genetic drift? - ANS Any change in allele frequency in a population due to chance
What is genetic bottleneck? - ANS Sudden and drastic reduction in the number of individuals
in a population
What is the founder effect? - ANS Chance "change" in allele frequencies that occurs when a
subset of a large population establishes a new population
Can genetic drift cause a strong evolutionary change? - ANS Yes, because change can occur
over time
What is gene flow? - ANS Movement in alleles between populations
What can gene flow do? - ANS 1. Gene flow IN can ADD alleles
2. Gene flow OUT can REMOVE alleles
, ©EVERLY 2025 ALL RIGHTS RESERVED
Can gene flow cause strong evolutionary change? - ANS Yes, if there's a lot of it
What is a mutation? - ANS A change in the heredity material of an organism
What is point mutation? - ANS When there is a mutation in the gene of a parent
Can mutation cause evolutionary change? - ANS Yes, because it can add new alleles
What is sexual selection? - ANS a type of natural selection that operates among individuals
of the same gender
What are the conditions of natural selection? - ANS 1. individuals must vary in traits
2. some of these traits differences are heritable
3. only some individuals survive to reproduce and/or survivors produce different numbers of
surviving offspring
4. Some heritable traits have better survival and reproduction than other traits (success is NOT
random)
What is the Theory of Evolution by Natural Selection? - ANS All species are related by a
common ancestry and the characteristics of species can be modified from generation to
generation in response to natural selection
What is a theory? - ANS One or more hypotheses about a broad class of observant tested by
many, many studies and always supported
What is a hypotheses? - ANS Proposed explanations for a set of observations
