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This European hedgehog population is: (Pick one.)

  1. Increasing
  2. Decreasing
  3. Stable
  4. Not enough information
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35) Genetic variation is never caused by mutations. It must be present in a population before natural selection can act upon the population. It does not decrease due to sexual reproduction. 36) Whenever diploid populations are in Hardy-Weinberg equilibrium at a particular locus, the allele frequency should not change from one generation to the next. Natural selection, gene flow, and genetic drift are not acting equally to change an allele frequency. Two alleles are present in equal proportions. Individuals within the population are evolving, not necessary because heterozygotes can come about in two ways. The population being diploid or doubling in number does not affect the equilibrium. Heterozygotes have two alleles. 38) Three-spined stickleback fish (Gasterosteus aculeatus) show substantial heritable variation in gill-raker length relative to differences in their diets. Longer gill rakers appear to function better for capturing open-water prey, while shorter gill rakers are more efficient for feeding on small invertebrates in shallow water around the sides. The most likely type of natural selection to be found in this scenario is disruptive selection. 39) The bottleneck effect is described as a few individuals becoming isolated from a larger population. Alleles are transferred to the next generation in portions that differ from the previous generation. There is a transfer of alleles in and out of a population due to the movement of fertile individuals. A sudden change in the environment randomly alters the gene frequency in a small population. 40) The most predictable outcome of increased gene flow between two populations is an increased genetic difference between the two populations. It does not affect the average fitness or decrease the genetic difference.
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Question Text
This European hedgehog population is: (Pick one.)
TopicAll topics
SubjectBiology
ClassClass 11