Question 23What is the MOST LIKELY explanation for why there is variation in aging across different species?O The strength of selection is determined by agingO Trade-offs only apply to some speciesO Mutation accumulation theory applies to some species while antagonistic pleiotropy applies to othersO Different species suffer different levels of background (i.e., extrinsic) mortality

Aging is a continuous and an inavitable process it occurs in all the species throughout the world…

What is the MOST LIKELY explanation for why there is variation in aging across different species? The strength of selection is determined by aging O Trade-offs only apply to some species Mutation accumulation theory applies to some species while antagonistic pleiotropy applies to others Different species suffer different levels of background (i.e., extrinsic) mortality

What is the MOST LIKELY explanation for why there is variation in aging across different species? The strength of selection is determined by aging O Trade-offs only apply to some species Mutation accumulation theory applies to some species while antagonistic pleiotropy applies to others Different species suffer different levels of background (i.e., extrinsic) mortality

Biology 2e

2nd Edition

ISBN:9781947172517

Author:Matthew Douglas, Jung Choi, Mary Ann Clark

Publisher:Matthew Douglas, Jung Choi, Mary Ann Clark

Chapter19: The Evolution Of Populations

Section: Chapter Questions

Problem 19CTQ: Describe a situation in which a population would undergo the bottleneck effect and explain what...

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Question- How is genetic drift different from natural selection? choose one from below 1. Natural selection occurs because some alleles confer higher fitness, whereas genetic drift occurs because of sampling error 2. natural selection has a stronger effect in large populations, whereas genetic drift acts primarily in small populations 3. natural selection is a mechanisms of evolution, whereas genetic drift is not a mechanisms but an outcome of evolution 4. natural selection tends to cause very rapid evolution, whereas genetic drift tends to operate on much longer time scales.
Question 18 When fitness is lower at both extremes of phenotypic variation for a trait (e.g., the very largest and very smallest beaks in a bird population) than for the median value in a population, the predominant evolutionary force at work is called Group of answer choices Only 1 correct answer phenotypic selection stabilizing selection directional selection phenotypic choice
QUESTION 46 Consider selection acting against dominant alleles compared to selection acting against recessive alleles. Which will lead to faster allele fixation and why?
Questions for Years since Separation:1) When genetic researchers compare the DNA of Northern Asian population versus NativeAmerican populations, they find a 0.07% difference. The “Mitochondrial Clock” formula tells usthat there has been about _____________ years since the separation of these two groups.2) When comparing the DNA of Northern Asians and European populations, they discovered a0.1% difference. The “Mitochondrial Clock” formula tells us that there has been about______________ years since the separation of these two groups.3) When comparing the DNA of Indonesian peoples to either the European group or the NorthernAsians, they find a 0.12% difference. The Mitochondrial Clock formula tells us that there hasbeen about _____________ years since the separation of these two groups.4) When researchers compare the DNA of African populations to any other group they find a 0.2%difference. The Mitochondrial Clock formula tells us that there has been about__________________ years since…
QUESTION 43 Which of the following statements is true about linkage disequilibrium? a. D= -0.21 indicates that two loci are in greater LD than D= 0.15 b. New alleles are born into a population in LE with the surrounding loci c. Divergent populations that experience a sudden large migratory event will be immediately in LE after mixing. d. Selective sweeps occur randomly along chromosomes as a result of LE and LD alternating at regular intervals.
Question 20 How do new species arise, according to the theory of natural selection? when an old species goes extinct, a new species arises to take its place ) individuals in a population pass on new traits they have acquired during their lifetimes (3) two new species spontaneously branch off from ancestor populations from time to time if a population is reproductively isolated in a sufficiently different ecosystem for an extended period of time, it will develop adaptations that will eventually render it incapable of interbreeding with its host population
QUESTION 16 You are examining a beloved population of trillium in the backyard of your childhood home. You recall as a child that flowers were bright white. As you return to the population you note that many (but not all) of the flowers have a faint purple vertical stripe in the middle of each petal. List each of Darwin’s postulates and what must be true about your population if it has undergone evolution by natural selection for petal color.
QUESTION 30 Misconceptions (false-truths accepted by the general public) are a constant problem in terms of evolution education. Of the following statements, which one is actually TRUE? a. Natural selection only acts directly on phenotypes of individuals. b. Populations must evolve to avoid and prevent extinction of the species. c. Populations evolve to perfection such that all traits an individual has maximizes all aspects of fitness. d. A new trait cannot evolve within a population while undergoing selection favoring a different trait.
Question A: From an evolutionary point of view, why can't we say that the human species is the most evolved? Briefly explain in your own words based on a concrete example
Question:- Consider in a population, the frequency of allele ‘A’ is 50%, and frequency of allele ‘a’ is 50%, the rate of mutation converting A to a is u = 10 to the negative 5. After 10000 generations, the allele frequency of A will be
QUESTION 18 Describe: Population aging and increased longevity are creating more multi- and intergenerational families in the U.S. Give two examples of ways in which family structure and family roles are changing because of these changes.
QUESTION 21 Which of the following can the results of a QTL tell you? a. The specific causative gene or genes underlying a trait you are studying. b. The heritability of your trait and how much the heritability is influenced by environment. c. Identify haplotypes associated with specific traits of interest in other populations. d. Identification of regions of the genome that are associated with a trait.