Concept explainers
To determine: Whether mutation in the insects exposed to insecticide is an adaptation.
Introduction: Adaption is a natural phenomenon and is a distinguishing character of the organisms that are evolved by natural selection. Therefore, adaption is also an evolutionary process. Mutation is the alteration in the genetic constitution of the organism which causes morphological as well as genetic changes in an organism.
To explain: Whether resistance to insecticide after some generations of the insect is an adaptation.
Introduction: Resistance to insecticide occurs due to the natural selection that is passed on to next generations, making them also resistant. An organism adapts to the change with time and according to the advantage of the character.
To determine: Whether the variation is an adaptation in the population of insects that are never exposed to the insecticide.
Introduction: Variation to insecticide is caused due to mutation. This mutation causes
To determine: Whether the variation is an adaptation in the population of insects that are polymorphic for two alleles of resistance.
Introduction: Variation to insecticide is caused due to mutation. This causes genetic variation in the insect population that is polymorphic for two alleles, and each of the allele is resistant against one of two pesticides that is alternately applied.
To determine: Whether the resistance to two insecticides in the insects that are polymorphic for two alleles is an adaptation.
Introduction: Variation to insecticide is caused due to mutation. This causes genetic variation in the insect population that is polymorphic for two alleles, and each of which confers resistance against one of two pesticides that is alternately applied.
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Check out a sample textbook solution- Scientists study the possible effects of human activity on the genetic variations within members of two populations of sparrows, A and B, that live within similar ecosystems. Population A lives in a recreational campsite while population B lives in a nature preserve. Both populations exhibit similar genetic variation between the parent population and second generation. However, a tornado touches down in the habitat of population A during the lifespan of the second generation. Which statement best describes the predicted difference between the third generation of the two populations? A - Population B underwent a speciation that will lead to an increase in the genetic variation of the third generation compared to population A due to natural selection. B - Population A underwent a speciation that will lead to an increase in the genetic variation of the third generation compared to population B due to natural selection. C - Population B underwent a bottleneck effect that will lead to a…arrow_forwardIn a population of yellow mushrooms, a mutation resulted in a new purple type of mushroom that herbivores avoided. Because herbivores avoided the purple mushrooms, they were able to spread more spores and increased to make up 1% of the population. In one year, however, flash flood killed all of the purple mushrooms in the population, leaving only a few yellow mushrooms alive. Identify which evolutionary mechanism was responsible for the fixation of the yellow mushroom genotype in this population. Select one: a. Mutation b. Genetic drift c. Non-random mating Ⓒd. Natural selection * Gene flow e.arrow_forwardRefer to the figure above. In their investigation of natural selection on Mc1r alleles (the gene that determines coat color) in Arizona pocket mice, Hoekstra et al. determined the frequency of the D and d alleles in each population. They also determined the frequency of alleles for two neutral mitochondrial DNA genes (genes that do not affect and are not linked to coat color). Why did the researchers include the mitochondrial DNA genes as part of their experimental design? Allele change for the neutral mitochondrial genes serves as an experimental group and gives information on any general background genetic difference among these populations. Allele change for the neutral mitochondrial genes serves as a control and determines coat-color differences among these populations. Allele change for the neutral mitochondrial genes serves as an experimental group and gives information on coat-color differences among these populations. Allele…arrow_forward
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- Human Heredity: Principles and Issues (MindTap Co...BiologyISBN:9781305251052Author:Michael CummingsPublisher:Cengage Learning