BIOL-4700 Lecture 5: L05 Sexual Selection Review

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lilacmuskrat45

10 Mar 2017

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Sexual selection: sexual selection is selection for traits that increase mating success, descent of man and selection in relation to sex (1871) It is faster because you don"t have to look for a mate. Leads to an increase in the number of genetic copies you contribute to future generations. Increases the relative viability of offspring across a greater range of environmental conditions: differences between males and females, males. Fitness is limited by number of mates. Mate with as many females as possible: females. Fitness is limited by the quality of one"s mate. Extract the most resources from the male as possible. Females are far more selective than males: what do males defend that females need, defensive cavities, nesting sites, foraging patches, territories, example of intersexual selection, elk bugle. Stimulates the female reproductive system to come into estrus: bullfrogs. Male bullfrogs compete for good egg-laying territories in the pond.

Related Questions

Random, chance events that change allele frequencies are knownas:

A. Gene flow

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C. Natural selection

D. Balancing selection

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What type of selection acts to maintain the two extremephenotypic variants in a population?

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Approximately, how much of our DNA is shared with our closestrelatives, chimpanzees?

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The large canines of male baboons are likely the result of________, while the fact that some male baboons are very colorfulis probably the result of _______.

A. Mutation; balancing selection

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Negative assortative mating results in an increased frequency ofhomozygous genotypes within a population.

True

False

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Genetic evidence suggests that humans and Neandertals neverinterbred.

True

False

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The specific variant of the FOXP2 gene associated with languageacquisition in humans is found in both humans and Neandertals.

True

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Industrial melanism describes the change in moth color from paleto dark after pollution from factories resulted in coating treetrunks with a layer of dark soot. Which statement is trueconcerning industrial melanism?

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Patterns of evolution can be seen above the species level

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Inbreeding is problematic because it increases the probabilitythat offspring inherit two copies of a recessive mutation thatcauses disease.