A population of gophers is very isolated, so no individuals can move in/out of the population. It is very small, so random events affect allele frequencies and many traits are under strong selection. Males are chosen randomly. Which statement is correct? A. Allele frequencies in 10 generations will be different than they are today. B. Individual gophers are evolving traits they need to survive C.Genetic drift is not acting on the gophers D. The population is in Hardy-Weinberg equilibrium

A population of gophers is very isolated, so no individuals can move in/out of the population. It is very small, so random events affect allele frequencies and many traits are under strong selection. Males are chosen randomly. Which statement is correct? A. Allele frequencies in 10 generations will be different than they are today. B. Individual gophers are evolving traits they need to survive C.Genetic drift is not acting on the gophers D. The population is in Hardy-Weinberg equilibrium

Concepts of Biology

1st Edition

ISBN:9781938168116

Author:Samantha Fowler, Rebecca Roush, James Wise

Publisher:Samantha Fowler, Rebecca Roush, James Wise

Chapter11: Evolution And Its Processes

Section: Chapter Questions

Problem 6RQ: Galapagos medium ground finches are found on Santa Cruz and San Cristóbal islands, which are...

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Which of the following statements describes an example of genetic drift?a. Allele g for fat production increases in a small population because birds with more bodyfat have higher survivorship in a harsh winter.b. Random mutation increases the frequency of allele A in one population but not inanother.c. Allele R reaches a frequency of 1.0 because individuals with genotype rr are sterile.d. Allele m is lost when a virus kills all but a few individuals and just by chance, none ofthe survivors possess allele m.
A group of four birds flies to a new location and starts a newcolony. Three of the birds are homozygous AA, and one bird isheterozygous Aa.A. What is the probability that the a allele will become fixed in thepopulation via genetic drift?B. If fixation of the a allele occurs, how long will it take?C. How will the growth of the population, from generation togeneration, affect the answers to parts A and B? Explain.
If the X3 allele is undergoing positive selection, what will be the likely end result? A There will be no individuals that are X3X3 B All individuals will be X1X3 or X2X3 because of the heterozygote advantage. C The variance of the trait will stay the same, but the mean value will increase. D The frequency of X3 will increase and it could potentially become fixed in the population. e The allele frequency of X1 and X2 will stay the same, but the allele frequency of X3 will increase.
A new species of snail was discovered. Your initial population genetics survey found that fA:0.48. To determine the primary mode of reproduction you survey the population again in one generation. You collect 100 individuals in the next generation. The composition of your collection is AA=38, Aa=20, aa=42. What is the primary mode of reproduction? a. random mating b. not enough information to determine c. nonrandom mating due to inbreeding
Which of the following is Not required for Natural Selection to occur with a biological population? A. Not all offspring survive to reproduce B.Individuals is the population with some phenotypic variants must have higher fitness on average C. Individuals with one phenotype must always have more offspring than individuals with other phenotypes D. The phenotypical variation within a population of organisms must be heritable E. Variation in the phenotypes of organisms within a population
A group of four birds flies to a new location and initiates a new colony. Three of the birds are homozygous AA, and one bird is heterozygous Aa. A. What is the probability that the a allele will become fixed in the population via genetic drift? B. If fixation of the a allele occurs, how long will it take? C. How will the growth of the population, from generation to generation, affect the answers to parts A and B? Explain.
Sickle cell anemia is maintained in human populations because individuals with a single copy of the sickle cell allele have resistance to malaria but lack the health problems of individuals with two copies of the allele. Variation at the sickle cell locus is maintained by which of the following? Group of answer choices A. heterozygote advantage B. random change in allele frequency C. mutation selection balance D. frequency dependent selection
subset of African diversity can be found in the genomes of all populations existing today. a. A subset of African diversity can only be found in populations whose ancestors migrated out of Africa at any point in time. b. African diversity is only found in the genomes of population with direct ancestors from Africa migrating from the continent in the last 160KY. c. True statement d. False statement Please answer asap and type your answer and do not copy from anywhere please
There is an outbred population of mice living in a farmer’s field. Mutations occur at a genecalled nurseryrhyme that cause a totally recessive form of blindness (h=0). These blind micedo not survive to reproduce because the farmer’s wife cuts off their tail (and other bits) witha carving knife. Surveying the field for baby mice you find that 3/10,000 mice are blind.A. Assuming that the population mates at random, what is the mutation rate of blindnesscausing alleles?B. Following more careful study you now find that there is actually a 20% reduction in theviability of heterozygotes for these mutations. What would you now estimate as themutation rate for this gene?
A scientist attempts to maintain a population of pea plants in a “non-evolving state” by trying to simulate the conditions required for Hardy-Weinberg equilibrium. He places the plants in a contained area under controlled conditions (no factors limiting) and makes certain that all crosses conducted are completely random. Which conditions for Hardy-Weinberg equilibrium have NOT been met? I. no gene flow II. no net mutations III. random mating IV. no natural selection A. I and II B. II and IV C. II only D. IV only
Which of the following statements is true about linkage disequilibrium? a. New alleles are born into a population in LE with the surrounding loci b. Genetic hitchhiking results from LD between surrounding loci and a locus under strong selection c. Loci in LE in two different populations with different allele frequencies will remain in LE when the two populations completely merge into a single population. d. The greater the selection on a locus, the smaller the haplotype block maintained around it e. D= 0.15 indicates that two loci are in greater LD than D= -0.23
A population has 25 individuals of genotype AA, 25 individuals of genotype aa, and 50 individuals of genotype Aa. Is this population in Hardy Weinberg equilibrium? Why or why not? Group of answer choices A. No because p2 + 2pq + q2 does not equal 1 B. Yes because p2 + 2pq + q2 = 1 C. Yes because the genotype frequencies match HW expectations based on allele frequencies D. No because there are more heterozygotes than expected under Hardy Weinberg E. No because there are fewer heterozygotes than expected under Hardy Weinberg