Podcast
Questions and Answers
Explain disruptive selection and provide an example.
Explain disruptive selection and provide an example.
Disruptive selection favors individuals with variations at opposite extremes of a trait over individuals with intermediate variations. Example: black-bellied seedcracker finch beak size.
How does stabilizing selection affect phenotypes in a population?
How does stabilizing selection affect phenotypes in a population?
Stabilizing selection favors the most common phenotypes within a population, leading to a decrease in variability and an increase in the prevalence of the favored traits.
What is balanced polymorphism and how is it maintained in a population?
What is balanced polymorphism and how is it maintained in a population?
Balanced polymorphism refers to the maintenance of multiple alleles in a population. In the case of sickle cell anemia, both (HBa) and sickle-cell (HBs) hemoglobin alleles are present in stable frequencies.
Why do individuals with either very large or very small beaks have a higher chance of survival in the black-bellied seedcracker finch example?
Why do individuals with either very large or very small beaks have a higher chance of survival in the black-bellied seedcracker finch example?
How does human birth weight exemplify stabilizing selection?
How does human birth weight exemplify stabilizing selection?
What is the term for the situation when two diverging groups maintain stable frequencies of both alleles due to selection pressures?
What is the term for the situation when two diverging groups maintain stable frequencies of both alleles due to selection pressures?
What is the term for the barrier that prevents the hybrid zygote from developing into a viable, fertile adult?
What is the term for the barrier that prevents the hybrid zygote from developing into a viable, fertile adult?
Give an example of a prezygotic barrier that prevents mating between species based on their habitats.
Give an example of a prezygotic barrier that prevents mating between species based on their habitats.
What is the term for the concept that defines a species based on a unique set of phenotypic features?
What is the term for the concept that defines a species based on a unique set of phenotypic features?
Which species concept focuses on the potential to interbreed and produce viable, fertile offspring within a group of populations?
Which species concept focuses on the potential to interbreed and produce viable, fertile offspring within a group of populations?
