I need help with Directional, Stabilizing and Disruptive Selection pls Microevolution - Genetic Diversityand Natural Selection - V2Microevolution is thethat results fromoccur over anumber ofcaused by changes inchanges occur to help populations betterMicroevolution results in adaptations as a result ofthe fittest offspring.Alleles and Gene PoolsThe physical traits ordepend onCHROMOSOME-segment ofONA that contains genestheorSpecies with moregeneticHOMOLOGOUS CHROMOSOMESa matched pair of chromosomesone from each parentare morelikely to survive when there arechallengingGENE-a section of DNA on achromosome that hasinstructions to make a proteinYou inherit a copy of eachgene from each parentin theenvironment like climate change.A gene pool describesofALLELE a variation of a geneFor example the eye colourprotein has alleles for bluegrey, brown and greenin apopulation.Natural SelectionNatural selection is the process by which individuals withtraits that make them better suited fortheir environmert are more likely toand. There are 4 types of natural selection:A) Directional SelectionIn directional selectionof the phenotypeIsresulting in a shift in the phenotypedistribution over time.What has happened to the mouse fur colour overgenerations?What selective pressure might cause this change?B) Stabilizing SelectionIn stabilizing selection, thephenotype isareover time.What selective pressure might cause mouse furphenotypes to change this way?C) Disruptive SelectionIn disruptive selectionof the phenotypearefor survival over time. This resultsin the loss of the intermediate phenotype. This mighteventually formWhat happened to the intermediate phenotype of mousefur colour over time?D) Sexual Selectionchanges thatand extreme phenotypesMicroevolution isin a population. Theseto their environment.Genetics ReviewedofGene for wing length-homozygousGene for wing colour-heterozygousNote: Moth wing colours more complicated thafrFur colour thangeover timeOnge ExteTOriginalFur colour changeover timeEv-Originalpopulation✰✰✰✰✰Phenotypes (ur colorFur colour changeover timeOriginal Evolvedopulation population

Natural selection can bring the adaptive evolution . It will increases the frequency of allele that…

A) Directional Selection In directional selection is distribution over time. What has happened to the mouse fur colour over generations? What selective pressure might cause this change? B) Stabilizing Selection In stabilizing selection, the phenotype is and extreme phenotypes are over time. What selective pressure might cause mouse fur phenotypes to change this way? C) Disruptive Selection In disruptive selection of the phenotype are for survival over time. This results in the loss of the intermediate phenotype. This might eventually form What happened to the intermediate phenotype of mouse fur colour over time? of the phenotype resulting in a shift in the phenotype

A) Directional Selection In directional selection is distribution over time. What has happened to the mouse fur colour over generations? What selective pressure might cause this change? B) Stabilizing Selection In stabilizing selection, the phenotype is and extreme phenotypes are over time. What selective pressure might cause mouse fur phenotypes to change this way? C) Disruptive Selection In disruptive selection of the phenotype are for survival over time. This results in the loss of the intermediate phenotype. This might eventually form What happened to the intermediate phenotype of mouse fur colour over time? of the phenotype resulting in a shift in the phenotype

Biology: The Unity and Diversity of Life (MindTap Course List)

15th Edition

ISBN:9781337408332

Author:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Publisher:Cecie Starr, Ralph Taggart, Christine Evers, Lisa Starr

Chapter16: Evidence Of Evolution

Section: Chapter Questions

Problem 3SQ: The process in which environmental pressures result in the differential survival and reproduction of...

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Most new mutations are detrimental, yet rare beneficial mutations canbe adaptive. With regard to the fate of new mutations, discuss whetheryou think it is more important for natural selection to select againstdetrimental alleles or to select in favor of beneficial ones. Which doyou think is more significant in human populations?
Rates of evolution appear to vary in different lin-eages. For example, the rate of evolution in the rat lineageis significantly higher than in the human lineage. Theserate differences are apparent whether one looks at changesin nucleotide sequences that encode proteins and are sub-ject to selective pressure or at changes in noncoding nucle-otide sequences, which are not under obvious selectionpressure. Can you offer one or more possible explanationsfor the slower rate of evolutionary change in the humanlineage versus the rat lineage?
Sympatric speciation by allotetraploidy has been proposed as acommon mechanism for speciation. Let’s suppose you were interestedin the origin of certain grass species in southern California.Experimentally, how would you go about determining if some ofthe grass species are the result of allotetraploidy?
Recent reconstructions of evolutionary history are often dependenton assigning divergence in terms of changes in amino acid ornucleotide sequences. For example, a comparison of cytochromec shows 10 amino acid differences between humans and dogs,24 differences between humans and moths, and 38 differencesbetween humans and yeast. Such data provide no information asto the absolute times of divergence for humans, dogs, moths, andyeast. How might one calibrate the molecular clock to an absolutetime clock? What problems might one encounter in such acalibration?
Genetic diversity 1. Why do multicellular organisms have two copies (alleles) of any given gene? 2. What genotype(s) will result in a dominant phenotype, and why? 3. What genotypes(s) will result in a recessive phenotype, and why? 4. What do mean by the “gene pool” of a population? And why is this such an important concept inunderstanding how evolution works on small scales?5. If p = 0.75, what does q equal? And how do you know this? 6. What does it mean to say that a population has been become “fixed” for a particular trait? Whatvalues for p or q tell us that fixation has occurred? 7. Ultimately, why are we concerned about the loss of genetic diversity (i.e., fixation)? 8. Contrast natural selection with genetic drift. Which one is always adaptive? Explain your answer. 9. What’s the bottleneck effect? Describe some examples of organisms that have experienced this &what caused it to occur. 10. How can gene flow help to restore variation that may have been lost through bottleneck…
AM Fri Jun 18 AA A f1.app.edmentum.com E Natural Selection: Mastery Test SnapSolve - Free Doubt Video Solutions and Maths Exer Previous Next O Natural Selection: Mastery Test O Submit Test Drag each tile to the correct location on the table. Decide if each statement is a fact or a misconception about the theory of evolution by natural selection. The theory says that organisms that are better adapted to their environments will have The theory says that natural selection gives organisms everything they The theory proposes that while natural selection acts on individuals, only populations evolve. need to live. higher survival and reproduction rates. The theory explains the origin of life. According to the theory, individual organisms can evolve during their lifespan. The theory suggests that the organisms in a population that are the most well adapted are those that are the largest. Fact Misconception O 2021 Edmentum. All rights reserved.
n 12 12 of 25 Scientific evidence documents the pattern of evolution. The evidence exists in a variety of categories, including direct observation of evolutionary change, the fossil record, homology, and biogeography. Sort the following examples into the correct categories. Drag each phrase to the appropriate bin. > View Available Hint(s) Reset Help same genetic code in fireflies and tobacco plants similarities in mammalian forelimbs development of drug resistance in bacteria discovery of transitional forms of horses similarity of endemic island species to nearby mainland species vestigial pelvis in right whales discovery of shells of extinct species the high concentration of marsupial species in Australia biogeography direct observation of evolutionary change fossil record homology P Pearson 12:06 PM EX home um ik T Y U home enter 4. B shift end alt ctrl 144
What theory of molecular evolution offers a baseline expectation of how DNA should change over time when natural selection is absent? O positive selection O neutral evolution O purifying selection O negative selection
Just as anatomical homology can lead to vestigial structuressuch as human wisdom teeth and the wings of flightlessbirds, genetic homology can lead to vestigial DNA sequences.For example, most mammal species produce an enzyme,L-gulonolactone oxidase, that catalyzes the last step in the productionof vitamin C. The species that produce the enzyme areable to do so because they all inherited the gene that encodesit from a common ancestor. Humans, however, do not produceL-gulonolactone oxidase, so we can’t produce vitamin C ourselvesand must consume it in our diets. But even though wedon’t produce the enzyme, our cells do contain a stretch of DNAwith a sequence very similar to that of the enzyme-producinggene present in rats and most other mammals. The human version,though, does not encode the enzyme (or any protein). Weinherited this stretch of DNA from an ancestor that we share withother mammal species, but in us, the sequence has undergonea change that rendered it nonfunctional. (The…
In a small group of people living in a remote area, there is a high incidence of "blue skin", a condition that results from a variation in the structure of hemoglobin. All of the "blue-skinned" residents can trace their ancestry to one couple, who were among the original settlers of this region. The unusually high frequency of "blue skin" in the area is an example of [ Select ] [Select] mutation natural selection sexual selection « Previous Next heterozygote advantage founder effect checkedat 9:39pm Subm
Full or partial limblessness has evolved many times invertebrates (snakes, lizards, manatees, whales). Do youexpect the mutations that occurred in the evolution oflimblessness to be in the coding or noncoding sequencesof toolkit genes? Why?
1. Describe the conditions in order for natural selection to occul. neproduction, heredity, variation in fitness or Organisms, variation Members of the popuiaion.if they are me natural selection automatically Tesults, 2. How does natural selection and evolution lead to speciation? Natural that and may even indy wal characters among organisms 1. Kely to survive and reproduce entually ead t0 speciation- selectio can result in are More Topic 4: Biodiversity Essential Question: Why is biodiversity important and how can it be protected? Vocabulary: Match the following vocabulary words with their definition. 1. Biodiversity 2. Species diversity 3. Genetic diversity 4. Ecosystem diversity 5. Extinction A species dying out b. The variety of life in the world The variety of genetic make ups d. The variety of species in an environment The variation of ecosystems within a biome a. с. e. Questions 1. Why are the world's rainforests so important? 2. Predict solutions for slowing the loss of…