24 Questions
What is sexual selection?
The process of natural selection acting on traits that improve an organism's ability to compete for mates
Why does sexual selection exist?
To favor traits that improve an organism's ability to attract mates and reproduce
What is intersexual selection?
Selection based on mate choice, where one sex chooses mates based on particular traits
What is intrasexual selection?
Selection based on competition between individuals of the same sex for access to mates
What is evolutionary fitness?
The ability of an organism to produce the maximum number of offspring
Does natural selection shape perfectly adapted organisms?
No, as it only operates on existing variations in a population
What is sexual selection?
The process by which individuals select their own mates based on certain traits
Is all evolution adaptive?
No, some evolution occurs due to random genetic drift
What is the consequence of inbreeding on the genetic structure of a population?
Decreases genetic diversity
Does natural selection shape perfectly adapted organisms? Why or why not?
No, because it does not act on all traits and outcomes are often compromises
What is evolutionary fitness and how is it measured?
It is the ability to survive and reproduce; measured by phenotype only
What is another name for migration in the context of natural selection?
Gene flow
What is the role of mutation in evolution?
It is a weak force of evolution because mutations are rare and typically do not lead to adaptive changes.
In what way does genetic drift primarily affect small populations?
Genetic drift occurs more readily in small populations and can lead to random loss of genetic diversity.
What is the consequence of inbreeding on the genetic structure of a population?
It decreases genetic diversity and increases the expression of deleterious recessive traits.
Does natural selection shape perfectly adapted organisms? Why or why not?
No, natural selection does not guarantee perfect adaptation as environmental conditions constantly change.
What are the genetic consequences of migration in a population?
Increased genetic diversity and reduced inbreeding
In what sized populations does genetic drift occur most readily?
Small populations
What is another name for genetic drift?
Allele fixation
What are two particular kinds of genetic drift?
Bottleneck effect and founder effect
In what sized populations does genetic drift occur most readily?
Small populations
What are two particular kinds of genetic drift?
Bottleneck effect and founder effect
What is the consequence of genetic drift on genetic diversity?
Decreases genetic diversity
Which of the following is an example of genetic drift?
A sudden reduction in population size due to a natural disaster, resulting in changes in allele frequencies
Test your understanding of evolution with these study questions related to mutation, migration, genetic drift, non-random mating, and inbreeding. Explore the forces of evolution and their genetic consequences.
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