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Q: Which of these situations offers the lowest “opportunity for selection” for males?
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In animal husbandary,if two closely related animals are mated for a few generation,it result in loss of fertility and vigour.why is this so?
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- The survival and reproduction of young Lazuli buntings (birds) depends on the brightness of their feathers, which range from dull brown to bright blue. Juvenile birds with dull brown feathers are not attacked by adult birds and are able to obtain high quality territories and reproduce more. Juvenile birds with bright blue feathers are more attractive to mates and reproduce more when they become adults. However, birds with intermediate plumage are often attacked by adults and usually fail to reproduce. This is an example of what type of selection? Stabilizing Directional Disruptive Frequency-dependent ArtificialExample of Non Random matingPolygyny is a form of polygamy in which a male mates with more than one female. Explain how three forms of polygyny differ from each other: resource-defense polygyny, female-defense polygyny, and male-dominance polygyny.
- Mockingbirds typically lay 3 eggs. If the mockingbird produces more than three eggs their young are often malnourished because they have so many to feed. If less than 3 eggs are produced they may not have any viable offspring. This is an example ofWhich of the following statements is NOT the reason why females are choosy? By being choosy, she can acquire advantageous genotypes for her offspring from her mates. By being choosy, she can acquire resource for her offspring from her mates. By being choosy, she can ensure that her male offspring can attract more females as well. Her seeming choosiness is a by-product of her stereotypical behaviors exploited by the males for mating gains. All listed above are reasons why she is choosyPolygyny is a common mating system in nature. Which one of the following scenarios is LEAST likely to result in a polygynous mating system? Male stalk-eyed flies form leks where receptive females come visit Male Neotropical giant damselfly defend water-filled tree holes, which are the oviposition sites for females. Suitable tree holes for oviposition are rare and females must mate with the resident male in exchange for access to the oviposition sites. Male Bengal tigers defend large territories that contain food sources. Female Bengal tigers visit male territories to mate. The density of the Bengal tiger is extremely low that male tigers rarely encounter more than one female in their lifetime. In the bumblebee-wolf Philanthus bicinctus, females are unreceptive until they finish constructing the long underground burrow as nest sites. Males search for locations containing a number of newly constructed burrows and attempt to control these sites against the intruders. Your cousin Peter…
- Explain why hermaphroditism is a good solution to enjoy the benefits of sex while also confronting the problem of finding a mate in a sparse population.Consider the temperature effect in the sex determination of a turtle species represented in the graph below. 100 What effect would a decrease in temperature below the epivotal temperature have on sex ratios of these turtles? 50 FT MT Temperature Fewer males and females will result. None of the other answers is correct. No difference in the proportion of females to males will result as only colder temperatures will alter the sex ratio in the offspring. More males than females will result. More females than males will result. To Percent female O O O OMale 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 males