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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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- A dairy farmer chooses to mate a male bull only with the female heifers that always make the greatest amount of milk, rather than heifers that produce a small amount of milk. What process is the dairy farmer employing when producing the next generation of calves?Illustrate and explain a back crossing and give a reason why such a mating plan is practical in commercial livestock productionPolygyny 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.
- Example of Non Random matingThis refers to the decrease in performance of the animal due to repeated mating of related individuals.Which is NOT an alternative mating strategy for sexually selected males who do not engage in direct combat with rivals? A. mate guarding B. sperm competition C. infancticide D. stealth tecnhiques
- In a population of birds, males have long red tail feathers that they use in mating displays, and also sing in the mornings to attract females. You find that some males have more red feathers in their tails than others, while some sing for longer periods of time. In this bird species, a high proportion of eggs fail to hatch. You measure the number of eggs that successfully hatch that are fathered by each male bird, and find that the number of successful hatchlings is proportional to how long a male sings, but is unrelated to the amount of red in his tail. Question: Propose an explanation for why males evolved both to sing and to have red tails, and how females likely evolved in response to both traits. [Note: avoid writing a paragraph for each sentence prompt; this should still be short, concise answers and Please write four sentences guided by the individual prompts] Your answer: Sentence 1: State which males and which females had the highest fitness. Sentence 2: What feature…What does positive assortive mating mean? a. Individuals that are different for a certain trait are more likely to mate b. Individuals that are alike for a certain trait are less likely to mate c. Individuals that are alike for a certain trait are more likely to mate d. Any individuals may mate randomly Give typing answer with explanation and conclusionCould hawthorn and apple maggot flies be considered an example of assortative mating? Explain your answer
- What is purposeful control over mating by choice of parents for the next generation?Why are polyandrous mating systems more rare than polygynous matings? a. Only males are capable of multiple rounds of reproduction within a single breeding season. b. Only females care for the young. c. Females usually experience more intrasexual selection pressure than males. d. Females usually devote more energy to offspring production and development.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.
