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In general, males experience stronger sexual selection than females.
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- In human population, males are in general larger than females. This observation can be seen as an example of sexual dimorphism. True FalseThe Fischer model of the 1:1 sex ratio predicts that natural selection favors parents who produce offspring of the underrepresented sex in the population. True FalseThe major factor in determining which sex is likely to be subjected to sexual selection is the body size testis size number of eggs level of parental investment All of the above
- Two male deer compete for access to a female by sparring with their antlers. What type of selection pressure is this? a Intrasexual b Intersexualone specific example of each type of sexual selection can I have an example in a list for each type of sexual selection intersexual and intrasexualDuring mating season, male rams compete with each other for access to females. This describes (please just select one answer the one the best fits) intersexual selection intrasexual selection the direct benefits model Hamilton-Zuk hypothesis Fisherian sexual selection
- Intrasexual selection favors traits that enhance direct competition among individuals of the same sex. are attractive to the opposite sex. increase survival. are easily adapted to change.The chance that two half siblings inheriting the same allele from their shared parent is 50%. True FalseSelfing changes genotype frequencies within populations. Group of answer choices True False
- You do not need the text from the image so font size does not matter. Please consider the figure, which contains data that were collected by Rice In the experiments that were performed by Ricei. males competed intensely for females, which resulted in selection for traits like 'high likelihood to remate with the same female' and 'high proportion among fertilised eggs fathered.'ii. only males experienced intense competition; females were obtained from a control population, in which no competition for mates was occurring, effectively fixing female responses.iii. males that were selected for success in mating competition were characterised by greater fitness.iv. when females were prevented from evolving compensatory life history traits, they incurred at least one cost for the benefits gained by males in increased reproductive success: greater female mortality (attributed to toxicity in male seminal fluid).v. once established, enhanced male traits were irreversible. Question 4…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.Which of these situations offers the lowest “opportunity for selection” for males? A. Females choose mates with a fancy ornament. B. Every female chooses one male to mate with for life. C. Locations that females need access to in order to reproduce are rare. D. Males fight each other for access to groups of females.