What conditions might favor reproduction now over waiting to reproduce in the future? (Select all that apply.) Low mortality rates High mortay rates Stable environments (i.e. low variability) Unstable environments (i.e. high variability) None of the above
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- In contrast to asexual reproduction, sexual reproduction (a) is a faster way to produce offspring (b) is more efficient (c) results in more offspring (d) is less efficient at removing harmful mutations from a population (e) increases genetic variety among members of a populationWhich of the following is associated with multiple reproductive episodes during a species’ lifetime? semiparity iteroparity semelparity fecundityTwo human populations have the same net reproductive rates (R0), but different generationtimes. In what ways are these two populations similar and different?
- 25. Organisms that reproduce asexually lack mechanisms for generating genetic diversity within a population. True FalseWhich of the following is not an adaptive feature of an opportunistic life history pattern?a. many offspringb. little or no care of offspringc. long life spand. small individualse. individuals that mature quicklythe area titled Genotype Relative Fitness. Notice that the default is for all three genotypes to be set at 1.0. This indicates that all three genotypes have the same effect on survival and reproduction. Change the Genotype Relative Fitness of the rr genotype to 0.6. This indicates that the rr genotype (white phenotype) has a strong disadvantage over the other type genotypes in terms of survival and reproduction. Start the simulation and let it run for 200 generations. http://virtualbiologylab.org/ModelsHTML5/PopGenFishbowl/PopGenFishbowl.html When you started the simulation, your initial alleles frequencies were: R = 0.5 r = 0.5 What are your allele frequencies after 200 generations of strong selection?
- #1: Elephant Seals have a polygynous mating system, in which a few males mate with many females while other males do not mate at all. Nearly all females produce one offspring per year. Assuming a 50:50 sex ratio, we would expect the average reproductive rate to be (chose one answer) a. higher in females b. the same in males and females c. higher in males d. random e. none of the aboveWithin a population, the negative tradeoff/s for an individual that reproduces earlier (at a younger age) than other members of the population is/are: (select all that are correct) Question 8 options: There are no disadvantages to reproducing earlier The provide less parental care They produce smaller offspring They are smaller than other members of the population of the same age They produce fewer offspring (per reproductive event)Under a simple model, the evolution of asexual reproduction strategies will take over a population. The model relies on two assumptions. Which of the following are the assumptions? a. Reproductive mode does not affect how many offspring are produced by a female. b. Reproductive mode does not affect the sexual selection on males c. Reproductive mode does not affect the probability of offspring survival d. Both a. and b. e. Both a. and c.
- can you please explain this Below is a life table for a hypothetical organism. What is the expected lifetime reproductive success for individuals carrying the A1 allele? (Note: RS: reproductive success) Question 3 options: 2.35 2.50 2.64 3.66 24.00If these conditions held constant – what would the expected heterozygosity be in thepopulation today (2018 to deal with a clean integer value for generations)?1b. In 1884 the population had grown to 106 when disaster struck the island. Of the 19 adult menon the island, 15 were in the same fishing boat that capsized, leaving only 4 adult men alive onthe island. These desperate times may have changed the sex ratio of the breeding population onthe island. Let’s say that now, each man fathered children with an average of 1.5 differentwomen (male:female ratio of 1:1.5). If we start back with a heterozygosity of 0.5 from this point,given the effective population size on Tristan da Cunha, what is the expected heterozygosity inthe current population 7 generations later?1c. The scenarios described in 1a and 1b are examples of which two evolutionary phenomena,respectively?What are advantages of asexual reproduction? Select all that apply. A) In a stable environment, a population that develops from asexual reproduction can grow quickly and thrive. B) In an unstable environment, a population that develops from asexual reproduction can grow quickly and thrive. C) Species that reproduce through asexual reproduction have more genetic diversity. D) Organisms in isolated areas can still reproduce through asexual reproduction.