You are raising a stock of Drosophila flies in which you have clipped off the wings of each individual. Assume that this treatment does not disrupt their mating success (it would). If you clip off the wings in each subsequent generation, what would you expect to observe in the 50th generation? Why? This is an example of whose ideas in evolution?
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You are raising a stock of Drosophila flies in which you have clipped off the wings of each individual. Assume that this treatment does not disrupt their mating success (it would). If you clip off the wings in each subsequent generation, what would you expect to observe in the 50th generation? Why? This is an example of whose ideas in evolution?
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- EVOLUTION LINK Could hawthorn and apple maggot flies be considered an example of assortative mating, which was discussed in Chapter 19? Explain your answer.Assume you are studying a species of slug where the eggs are fertilized and transferred to the male. As a result the male is not able to increase reproductive success by mating with multiple partners. Therefore which of the following about sexual selection in this species is not true? Females are more likely to develop traits that signal genetic quality to males. Females will be able to increase reproductive success with increased mating partners. Sexual selection in males will lead them to be choosy with what females they mate with. Sexual selection in males will lead them to mate indiscriminately when they find a female.What are the Equality in the Sexes in Human Evolution? Why is this important to learn?
- In many hummingbird species in North America, males but not females have a bright red throat patch and both sexes show a preference for red-colored flowers over those with different colors. How would you determine that the sexual dimorphism in throat patch coloration in male hummingbirds evolved by sensory exploitation?What sorts of studies would we undertake in order to confirm that human mating behaviors are truly driven by biological forces, e.g., evolutionary fitness, rather than cultural or societal advantages?According to the theory of evolution, why have these changes occurred in horse populations over the course of many generations?
- Nursing bees take care of the queen and newly hatched bees. However, nursing bees themselves do not reproduce. How could natural selection act upon such behavior? Because this behavior does not directly benefit the nursing bee itself, it is not favored by natural selection. Because this behavior increases the number of surviving offspring that share genes with the nursing bee, it is favored by natural selection. Because this behavior selectively decreases the number of offspring harboring non-similar genes with the nursing bee, it is favored by natural selection. Because this behavior does not increase the number of surviving offspring that are identical in genes with the nursing bee, it is not favored by natural selection. why do females have a greater disadvantage compared to males concerning sexual reproduction? How has this difference between the sex shape sexual selection in general? Choose one form of communication and explain how it is used by competing sex is attracting a mate. The digger bee’s “postcopulatory courtship” consists of elaborate tactile stimulation that the male provides his partner after she has accepted his sperm. Why is this behavior a Darwinian puzzle, and what might its adaptive value be?
- Normally, male red ducks only try to mate with females of their own species. A researcher swapped eggs between the nests of red ducks and blue ducks (a different species) and found that if male red ducks were raised by female blue ducks, later in life they only tried to mate with female red ducks. Which of the following inferences is supported by these results? Group of answer choices The mate preference of male red ducks is environmental. The mate preference of male red ducks is genetic. The mate preference of male red ducks is innate. The mate preference of male red ducks is learned.Would you expect sexual selection to increase or decrease adaptation of a population to its environment? Do the pleiotropic effects and good genes mechanism for the evolution of female preferences differ in their implications for adaptation to the environment?Why might natural selection act more strongly on traits that improve reproductive success early in life rather than later in life?
