Podcast
Questions and Answers
How do mutations persist in populations?
How do mutations persist in populations?
- If they are beneficial for the environment
- If they can be passed from generation to generation (correct)
- By being harmful to the organisms
- By mutating rapidly within a single generation
Why is it unlikely for two siblings (except identical twins) to look exactly alike?
Why is it unlikely for two siblings (except identical twins) to look exactly alike?
- Due to the predictable assortment of chromosomes during gamete formation
- Because of the random assortment of chromosomes during gamete formation (correct)
- Because of the non-random distribution of chromosomes during genetic recombination
- Because they share the exact same genetic material from their parents
What is the main factor determining the number of phenotypes for a given trait?
What is the main factor determining the number of phenotypes for a given trait?
- Physical traits of the parents
- Environmental factors alone
- Interaction of multiple genes and environmental factors (correct)
- Number of chromosomes in the organism
What defines a single-gene trait?
What defines a single-gene trait?
How are phenotypic ratios determined in populations?
How are phenotypic ratios determined in populations?
What type of curve is typical of polygenic traits?
What type of curve is typical of polygenic traits?
What is one way molecular biology can be used to trace the process of evolution?
What is one way molecular biology can be used to trace the process of evolution?
What genetic evidence supports the idea that all organisms share common ancestors?
What genetic evidence supports the idea that all organisms share common ancestors?
How does recent research on Galapagos finches contribute to our understanding of natural selection?
How does recent research on Galapagos finches contribute to our understanding of natural selection?
What hypothesis have the Grants been studying regarding evolution?
What hypothesis have the Grants been studying regarding evolution?
What key discovery did twentieth-century geneticists make about genes and variation?
What key discovery did twentieth-century geneticists make about genes and variation?
What is the role of natural selection in the evolution of populations?
What is the role of natural selection in the evolution of populations?
How does artificial selection differ from natural selection?
How does artificial selection differ from natural selection?
According to evolutionary theory, what is the significance of descent with modification?
According to evolutionary theory, what is the significance of descent with modification?
Why is high fitness crucial for an organism's survival?
Why is high fitness crucial for an organism's survival?
How does high fitness relate to adaptations in different environments?
How does high fitness relate to adaptations in different environments?
What is the primary outcome of natural selection on populations?
What is the primary outcome of natural selection on populations?
What does a true clade must contain?
What does a true clade must contain?
In classification, what is the main purpose of comparing DNA sequences?
In classification, what is the main purpose of comparing DNA sequences?
Why is DNA analysis preferred over morphological traits for classification?
Why is DNA analysis preferred over morphological traits for classification?
What differentiates a clade from a class in taxonomy?
What differentiates a clade from a class in taxonomy?
Why are cladograms considered graphical presentations and not fixed representations?
Why are cladograms considered graphical presentations and not fixed representations?
What aspect of living organisms does the tree of life show?
What aspect of living organisms does the tree of life show?
What is the term used to describe the theory in evolutionary biology proposing long periods of little evolutionary change punctuated by bursts of rapid evolution?
What is the term used to describe the theory in evolutionary biology proposing long periods of little evolutionary change punctuated by bursts of rapid evolution?
During what periods would rapid evolution be expected to occur?
During what periods would rapid evolution be expected to occur?
What determines the speed at which evolution occurs?
What determines the speed at which evolution occurs?
Which term refers to the concept that changes in species happen gradually over long periods through small, incremental changes?
Which term refers to the concept that changes in species happen gradually over long periods through small, incremental changes?
In evolutionary theory, what does the fossil record occasionally show as an interruption to gradual evolution?
In evolutionary theory, what does the fossil record occasionally show as an interruption to gradual evolution?
What occurs to surviving species after a mass extinction that can lead to the diversification of new species?
What occurs to surviving species after a mass extinction that can lead to the diversification of new species?
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