22. When investigating the shell color of a species of snail found only in a remote area seldom visited by humans, scientists discovered the distribution of snails shown in the graph to the right. Based on the graph, which type of natural selection is the snail population undergoing? A. Directional selection B. Disruptive selection CAStabilizing selection ulation of finches in which one subset of birds has a short, dark Number of Individuals light Coloration

22. When investigating the shell color of a species of snail found only in a remote area seldom visited by humans, scientists discovered the distribution of snails shown in the graph to the right. Based on the graph, which type of natural selection is the snail population undergoing? A. Directional selection B. Disruptive selection CAStabilizing selection ulation of finches in which one subset of birds has a short, dark Number of Individuals light Coloration

Name: 23 4 of 770%series of years. Which of the following is the best possib
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Description: 23 4 of 770%series of years. Which of the following is the best possible explanation for the change in the data?A. Forest fires wiped out the prefered habitat of the light-colored mothsB. Light-colored moths decreased due to a disease specific to the

Human Heredity: Principles and Issues (MindTap Course List)

11th Edition

ISBN:9781305251052

Author:Michael Cummings

Publisher:Michael Cummings

Chapter19: Population Genetics And Human Evolution

Section: Chapter Questions

Problem 10QP

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77)Each graph below shows the frequency of the A allele in six simulated populations (each line in a graph) over 500 generations. Each of the six simulations within a graph were done with the exact same settings of relative fitness among the genotypes and population size BUT these settings differed between the four graphs. Which graph shows a situation in which the effect of selection is the highest relative to the effect of drift? C D A B
JUST ANSWER, DON'T EXPLAIN Microevolution is described by which of the following? Select one: A. Changes in anatomical structures found in an individual when compared to ancestral forms of the species B. Changes in anatomical structures found in a population when compared to ancestral forms of the species C. Changes in the frequency of alleles in a population D. Changes in the frequency of alleles in an individual
Color in McIver beetles is determined by two alleles at one gene locus. McIver beetles must have a heterzygous genotype (genotype A1A2) in order to have a brown color phenotype. Calculate the frequency of the brown beetles in the population if the frequency of the A1 allele is 0.6.
a study to assess the strength of selection on alleles of a gene “B” which affects brightness of the bioluminescence in fireflies. Fireflies with the brightest light (genotype BB), have an average of 5 offspring. Fireflies with the dimmest light (genotype bb), have an average of 20 offspring. Fireflies with an intermediately bright light (genotype Bb), have an average of 25 offspring. What is the fitness of… BB = Bb = bb = For which genotype would selection be strongest?
In a population of mayflies, variation in the STRIPE gene causes different body coloration. SS individuals have skinny stripes, Ss individuals have wide stripes, and ss individuals are unassigned. You collect some mayflies and estimate that the frequency of the S allele is 0.85. You want to know whether the population is evolving, so you will return to the same site next summer and collect 1000 mayflies from the next generation. If the population is not evolving, how many of the 1000 mayflies collected next summer should have wide stripes. (round to the nearest whole number) A. 255 b.850 C. 723 D. 23
In a hypothetical bug population, color is determined by a single gene and black is dominant over white. The frequency of the black allele is 0.1. If this population is in Hardy-Weinberg Equilibrium, what percentage of the bugs would we expect to be white? Calculate the genotype frequencies of the 2nd generation is a hint.
Considering the Hardy-Weinberg theorem’s assumptions, which of the following statements is NOT correct? (Recall that there are certain assumptions that must be true in order for the Hardy-Weinberg theorem to accurately predict genotype ratios in the next generation.)a) The population must be very large so there random genetic drift will not occur.b) No natural selection can occur.c) Mating must be random.d) Individuals must migrate into and out of the population so that gene flow will occur.e) Mutations must not occur.
Allele frequencies: p+q = 1 Genotype frequencies: p2 + 2pq + q2 = 1_________________________________________________ 1. If 9% of an African population is born with a severe form of sickle-cell anemia (ss), what percentage of the population will be more resistant to malaria because they are heterozygous(Ss) for the sickle-cell gene? 2. This is a classic data set on wing coloration in the scarlet tiger moth (Panaxia dominula). Coloration in this species had been previously shown to behave as a single-locus, two-allele system with incomplete dominance. Data for 1612 individuals are given below: White-spotted (AA) =1469 Intermediate (Aa) = 138 Little spotting (aa) =5 Calculate the following frequencies: A=, a=, AA=, Aa=, aa=
In this version of the simulation (500 population size; 500 carrying capacity), all fish are equally likely (though not 100% likely) to survive and reproduce. There are no mutations, nor are there any entering or leaving the population. When they reproduce, they choose a mate from the pool at random and produce ten offspring by chance with the probability of the offspring’s genotypes determined by the punnett square. What caused the allele frequencies to change and vary in the trials? (ex attached).
A student sampled a population of fruit flies in which the percentage of homozygous recessive white eyed males (rr) was 70%. Calculate a) Allele frequencies for white and red gene b) Genotypic frequencies in case of inbreeding of the population in the next generation
There are three genotypes for flower colour in Barberton Daisies. DD = Red; Dd = Orange; dd = yellow. The allelic frequency of f(D) = p = 0.634. Scientists observed 2 red, 18 orange and 2 yellow flowers in a field of Barberton Daisies. How many yellow daisies would you have expected in this population if the population was randomly mating, large and not affected by mutation, migration or natural selection?
2) In 1999 suppose that in a field of snapdragons (a type of flower), there are 8000 red snapdragons (RR), 4000 pink snapdragons (RW), and 2000 white snapdragons (WW). In 2016 there are 10000 red snapdragons (RR), 2000 pink snapdragons (RW) and 1000 white snapdragons (WW) a) Calculate the genotypic frequencies of the population in 1999 and in 2016. b) Calculate the allele frequencies of the parent population 1999 and 2016. c) Is micro-evolution occurring? Explain and provide a possible explanation for why this bee pollinated plant might be experiencing micro-evolution.