Campbell Biology (11th Edition)
11th Edition
ISBN: 9780134093413
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Chapter 51.4, Problem 3CC
Summary Introduction
To propose a hypothesis: To check the altruistic behavior in a person by the Hamilton rule if that person has passed the reproductive age.
Concept introduction:
“Hamilton rule” is applied to analyze the amount of the fitness in an individual by observing the altruistic behavior in an individual. It analyzes the potential of a sibling male or female to reproduce and give rise to the progenies. It was proposed by William Hamilton, a British geneticist.
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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.
Evolutionary biology
What are 4 conditions in which natural selection favors altruistic behaviors in which the individual performs costly actions to benefit others?
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.
Chapter 51 Solutions
Campbell Biology (11th Edition)
Ch. 51.1 - If an egg rolls out of the nest, a mother greylag...Ch. 51.1 - WHAT IF? Suppose you exposed various fish species...Ch. 51.1 - MAKE CONNECTIONS How is the lunar-linked rhythm...Ch. 51.2 - How might associative learning explain why...Ch. 51.2 - Prob. 2CCCh. 51.2 - Prob. 3CCCh. 51.3 - Why does the mode of fertilization correlate with...Ch. 51.3 - MAKE CONNECTIONS Balancing selection can maintain...Ch. 51.3 - WHAT IF? Suppose an infection in a common...Ch. 51.4 - Prob. 1CC
Ch. 51.4 - Prob. 2CCCh. 51.4 - Prob. 3CCCh. 51 - How is migration based on circannual rhythms...Ch. 51 - Prob. 51.2CRCh. 51 - In some spider species, the female eats the male...Ch. 51 - Prob. 51.4CRCh. 51 - Prob. 1TYUCh. 51 - Prob. 2TYUCh. 51 - Female spotted sandpipers aggressively court males...Ch. 51 - Prob. 4TYUCh. 51 - Although many chimpanzees live in environments...Ch. 51 - Prob. 6TYUCh. 51 - Level 3: Synthesis/Evaluation 7. DRAW IT You are...Ch. 51 - EVOLUTION CONNECTION We often explain our behavior...Ch. 51 - SCIENTIFIC INQUIRY Scientists studying scrub jays...Ch. 51 - SCIENCE, TECHNOLOGY, AND SOCIETY Researchers are...Ch. 51 - WRITE ABOUT A THEME: INFORMATION Learning is...Ch. 51 - SYNTHESIZE YOUR KNOWLEDGE Acorn woodpeckers...
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- Please solvearrow_forwardPhalaropes are shore birds with brightly colored females and dull colored males. Females are larger than males and compete with each other for access to males. Considering sexual selection theory, select the idea(s) below that seem(s) most plausible in light of the pattern of sexual dimorphism? Pick all that apply This is a picture of a brightly colored female: O Females incubate eggs and care for the young. Males incubate eggs and care for the young Males are choosy. males are not choosyarrow_forwardPlease solvearrow_forward
- In the context of the runaway sexual selection hypothesis, what role does female mate choice play in the evolution of exaggerated traits in males? Females ignore males with exaggerated traits in favor of other factors such as resources Females display exaggerated traits themselves to attract males with similar traits Females have no preference for males with exaggerated traits Females actively select mates with these traits, leading to their exaggerated developmentarrow_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_forwardEVOLUTION CONNECTION We often explain our behaviorin terms of subjective feelings, motives, or reasons, butevolutionary explanations are based on reproductive fitness.Discuss the relationship between the two kinds of explanation.For instance, is an explanation for behavior such as “falling inlove” incompatible with an evolutionary explanation?arrow_forward
- Which of the following is NOT an example of sexual selection in the wild? * Peacocks showing off bright feathers to attract the peahens. Newts camouflaging in their environment so predators can't see them. Frogs singing loud songs to attract a mate. Rams butting heads and fighting to gain access to the females. INTL O 4:32 novo N42 Touch 4. %23 24 & backspace 4. 7 8 e r y ab f k enter shift C V alt ctrl altarrow_forwardWhat 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?arrow_forwardWhat is the relationship between reproductive value and strength of selection? when reproductive value is high, selection is weak when reproductive value is high, selection is strong there is no relationship; it is constantarrow_forward
- Give Detailed Solution with explanationarrow_forwardPart 1. Neuroscience of social behaviour The data in figure 1 below show the shoaling behaviour of wild-type zebrafish compared to a novel zebrafish mutant. Groups of sixteen fish were placed into a large rectangular tank and their behaviour was recorded for 5 minutes. Tracking software was used to estimate the nearest neighbour distance and inter-individual distance. The bar charts depict the mean and standard deviation (shown as an error bar). ** indicates a statistically significant difference individual differences. Q1. Describe the phenotype of the mutant zebrafish compared to wild-type. I found this question online for revision but i cant find the mark scheme.arrow_forwardAccording to Hamilton's Rule, in which scenario is selection for cooperative breeding expected to be the strongest? but lose the chance to have Helpers raise and increase the survival and reproduction of of their own offspring. O 100 additional 2nd cousins twice removed to whom they are 0.00781 (0.781%) genetically related; 2 of their own offspring. 60 additional 1st cousins once-removed to whom they are 0.0625 (6.25%) genetically related; 1 of their own offspring. O 50 additional grandnieces/nephews to whom they are 0.125 (12.5%) genetically related; 2 of their own offspring. None of the three scenarios are likely to result in the evolution of cooperative breeding according to Hamilton's Rule.arrow_forward
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