Male sunfish engaging in sneaker copulation was still an example of intrasexual selection even though they never directly interact with the parental males who defend nests. Why is this interaction still classified as intrasexual selection even though their was no direct conflict? O It wasn't. Males must directly, physically fight for intrasexual selection to occur. Sneaker males still denied parental males reproductive success as a function of their behavioral strategy. Females chose parental males more than sneakers.
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- Sexual selection occurs whena. one sex has a higher fitness than the otherb. a species exhibits sexual dimorphismc. there is a male dominance hierarchy and only the alpha male reproduces. d. There is monogamous mating.e. A trait is favored by one sex such that individuals of the opposite sex possessing that trait have an increased likelihood of reproducing.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.According to Hamilton’s rule,(A) natural selection does not favor altruistic behavior thatcauses the death of the altruist.(B) natural selection favors altruistic acts when the resultingbenefit to the recipient, corrected for relatedness, exceedsthe cost to the altruist.(C) natural selection is more likely to favor altruistic behaviorthat benefits an offspring than altruistic behavior thatbenefits a sibling.(D) the effects of kin selection are larger than the effects ofdirect natural selection on individuals.
- Which of the following sexual traits is LEAST likely to have evolved due to male-male competition for mates, also known as intraspecific sexual selection?a) Enlarged femurs that an insect uses to kick other malesb) Brushes on the tip of a dragonfly penis used to remove sperm of other malesc) Mate-guarding behavior of a warbler during the female’s fertile periodd) Elongated tails of the male swordtail fish used during courtshipConsider the data that are summarised in the figure i. The data in part (a) are consistent with the hypothesis that alarm calling only in female black-tailed prairie dogs evolved in accordance with kin selection. ii. On the basis of the data in part (a), male black-tailed prairie dogs without kin in their home coteries almost are as likely (i.e., within 10%) to produce alarm calls as are female black-tailed prairie dogs with kin in their home coteries.iii. On the basis of the data in the figure, males and females produce alarm calls more often when the kin that they live with are offspring than when the kin that they live with are parents and siblings.iv. On the basis of the data in part (b), alarm calls in black-tailed prairie dogs constitute merely parental care (i.e., rather than altruism).v. On the basis of the data in part (b), mean alarm calling percentage is greater for male black-tailed prairie dogs than for female black-tailed prairie dogs. Question 2 options:…In a populationof manatees, short whiskers are recessive to long whiskers. There are estimated to be only 4387 manatee left in the world. Of these, 827 have short whiskers. What is the frequency of homozygous recessive individuals?
- Male California sea lion mating success is determined by the number of mates they can acquire. Larger males are more successful at maintain larger territories. Females remain in one territory for the duration of the mating season and larger territories support more females than smaller territories. Additionally, the most successful males will fast during mating season to remain present in their territory at all times. If they leave to hunt they risk loss of their territory and access to all the females present in it. Which of the following best describes sexual selection in this species? a. Males likely engage in male-male combat to maintain territories. b. Intersexual selection is likely stronger than intrasexual selection. c. Sexual selection on the females is stronger than on the males. d. Females will mate with smaller males at a higher frequency than larger malesWhat is the proximate cause of male deer fighting over females?a. to determine their supremacy over other malesb. to injure other males so that these other males cannot mate withfemalesc. to maximize the number of genes they pass ond. because changes in day length stimulate this behaviore. because fighting helps rid the herd of weaker individualsI had trouble with explaining how natural selection affects alllele and genotype frequency. Does natural natural selection affect alleles by causing adaption to happen increasing the frequency of advantageous alleles?
- An anthropologist discovered that Papa new Guyana tribes that had given up the customs of cannibalism also had an avid aversion to grapefruit . The ability to taste the horridbitterness of PTC present in grapefruit respectively human brain tissue is due to a dominant alial. A small tribe of 637 Papa New Guinea hens was tested by a population geneticists the following results were displayed. Tasters Non-tasters Total Males 171 86 257 Females 337 43 380 Total 508 129 637 A.)Calculate the recessive ally of frequency (i)among males (ii) among females B.) calculate the amount of individuals being homeless sigus for tasting PTC, also the number of heterozygotes individuals and non tasters within the tribe. C.) another tribe still being cannibals trust past the territory of the other tribe they were captured killed and feasted on the brains of 50 PTC tasting males respectively 19 females as to access their abilities seen as a gift from gods.…Imagine that you are a conservation biologist responsible for the well-being of a bufello herd consistingof 100 mature males and 100 mature females. In this herd, there is no appreciable mutation, there isno migration in or out, and there is no selection. At the Fuzzy gene locus, there are two alleles, G and E.Homozygous G individuals have fuzzy fur, homozygous E individuals have rough fur, and heterozygoteshave shaggy fur. Suppose you survey the herd and find that there are 44 fuzzy individuals, 72 shaggyindividuals, and 84 rough individuals. Suppose you watch the buffalo and discover that while all the females breed, a small number of males(10) establish breeding harems, while the other males do not breed.a) What is the effective population size of this herd? That is, what size "ideal" population ofbalanced sex ratio would have genetics similar to this population?b)How does the effective population size compare to the actual population size?c) Under Hardy-Weinberg equilibrium, what…Imagine that you are a conservation biologist responsible for the well-being of a bufello herd consistingof 100 mature males and 100 mature females. In this herd, there is no appreciable mutation, there isno migration in or out, and there is no selection. At the Fuzzy gene locus, there are two alleles, G and E.Homozygous G individuals have fuzzy fur, homozygous E individuals have rough fur, and heterozygoteshave shaggy fur. Suppose you survey the herd and find that there are 44 fuzzy individuals, 72 shaggyindividuals, and 84 rough individuals.a)What is the size of the population?b)Do the alleles have a simple dominance relationship? Describe.c)What are the frequencies of the two alleles?d)Is the population in Hardy-Weinberg equilibrium?If not, how do you know, and what might be the cause?