Concept explainers
To explain: The conditions in sexual selection that favor polygynous (or polyandrous) mating systems.
Introduction: The selection of the species is chosen by nature itself. Criteria of adaptability and having the superior genes that are beneficial for the population in an individual are promoted by the natural selection. The variations that are adopted by the individual serve the criteria for a better survival rate of the species.
To explain: The reason why monogamy is uncommon.
Introduction: The selection of the species is chosen by nature itself. Criteria of adaptability and having the superior genes that are beneficial for the population in an individual are promoted by the natural selection. The variations that are adopted by the individual serve the criteria for a better survival rate of the species.
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Biology (MindTap Course List)
- Why are polyandrous mating systems more rare than polygynous matings? Only males are capable of multiple rounds of reproduction within a single breeding season Only females care for the young Females usually experience more intrasexual selection pressure than males Females usually devote more energy to offspring production and development.arrow_forwardWhat is purposeful control over mating by choice of parents for the next generation?arrow_forwardWhich of the following statements about inter- and intra-sexual selection is FALSE? O Males are typically the sex experiencing intrasexual selection because they are generally limited by access to mates, whereas females are generally limited by access to resources. Intersexual selection can explain the occurrence of extravagant display traits in males such as the ornate coloration in guppies. Males competing against each other to aquire the best nuptual gift is an example of intrasexual selection. O Either intersexual or intrasexual selection may occur within a population, but not both.arrow_forward
- Intrasexual selection involves competition among one sex (typically males) for mating access to the other sex. Intersexual selection involves mate choice in which individuals from one sex (typically females) choose their mates from among individuals of the other sex. Imagine a group of males that is engaged in agonistic behavior, from which Male A emerges triumphant. Now imagine a female that is assessing all of the males that were involved in the fights, and chooses Male A. Explain why this situation shows how intrasexual and intersexual selection pressures are likely both at play in the trait selection.arrow_forwardDefine sexual selection?arrow_forwardWhat type of mating system developed in Round 1 without male parental involvement? Why? What type of mating system developed in Round 2 with male parental involvement? Why? If males and females had the same number of sperm, would the two rounds differ? howarrow_forward
- The good genes model of sexual selection is a popular hypothesis for mate choice. What is an underlying flaw with the hypothesis that must be explained?arrow_forwardAssume 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.arrow_forwardDescribe thoroughly the selective advantages and disadvantages organisms that reproduce sexually have over those that reproduce asexually, as well as the ramifications of mate choice on the traits present in species. The following questions could help answer the question above. What are the advantages of sexual reproduction? What are the disadvantages? How do traits selected by sexual selection and those selected by differential survival mix in an animal species? i.e. is it more important to mate or survive? Use specific examples to illustrate your point. Your answers should indicate an understanding of the mechanism behind natural selection. Propose a scenario where asexual reproduction would be favorable.arrow_forward
- Would you expect environmental conditions to influence syngamy? Design two experiments to investigate the effects of two environmental conditions on the frequency of syngamy. How would you measure syngamy? Its frequency?arrow_forward|(A) A well trained alien biologist visiting earth would be able to tell that the mating system of gorillas is strongly polygynous and that of man's weakly polygynous. How could he/she/it tell this just by looking at gorillas and humans? (B) Is harem polygyny an ESS or have "cheater" behaviors evolved to exploit or exist within these systems? (C) If your answer was yes then describe a cheater behavior within a polygynous system.arrow_forwardHow does density dependent affect intraspecific?arrow_forward
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