18 Questions
Which type of selection favors the survival of individuals with intermediate phenotypes?
Stabilizing selection
In balancing selection, what is maintained in a population over many generations?
Genetic diversity
What is the main characteristic of disruptive/diversifying selection?
Favors survival of extreme phenotypes
Which type of selection is likely to occur in populations that occupy heterogeneous environments?
Disruptive selection
What does directional selection focus on in terms of phenotypic range?
Extreme phenotypes at one end
Which type of selection favors individuals with higher fitness values becoming more prevalent?
Natural selection
What is the primary focus of intrasexual selection?
Individuals directly competing for mating opportunities
How does sexual dimorphism differ from intersexual selection?
Sexual dimorphism refers to the difference between male and female morphologies within a species, while intersexual selection involves males directly competing with each other.
In the context of sexual selection, what is cryptic female choice?
The process where the egg selects against genetically related sperm
What is the main outcome of sexual selection according to the text?
Traits that decrease survival but increase reproductive success
Which behavior would NOT typically be associated with intersexual selection?
Males directly competing with each other for access to females
What is the significance of sexual dimorphism in the context of sexual selection?
Male characteristics are more intensely affected than female characteristics
What is the relationship between male coloration and predation according to the text?
Places with few predators tend to have brightly colored males.
In the context of sexual selection, what does 'directional selection' refer to?
Selection that favors individuals with extreme phenotypes.
Why do brightly colored males tend to be less plentiful in places with abundant predators?
Bright coloration attracts predators, increasing the risk of predation.
What role do females play in sexual selection according to the text?
Females prefer males based on their coloration and other characteristics.
What is the main difference between intrasexual and intersexual selection?
Intrasexual selection involves competition between individuals of the same sex, while intersexual selection involves mate choice by one sex.
What does balancing selection favor in terms of male coloration?
Moderate coloration for a balance between reproductive success and predation risk.
Explore the concepts of heterozygote advantage, negative frequency-dependent selection, and sexual selection in genetically diverse populations. Understand how these mechanisms impact the evolution of traits and fitness in different species.
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