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- 6)Which one of these statements about fitness is most accurate? a)Fitness is a measure of strength & health b)Fitness can only be measured at the population level c)Fitness may change at a population level, but is constant for an individual d)Fitness is an overall measurement that applies to all evolutionary mechanisms e)Fitness is a measure of reproductive successAn Eastern European immigrant carrying the allele for Tay-Sachs disease settled in a small village on the St. Lawrence River. Many generations later, the frequency of the allele in that village is statistically higher than it is in the immigrants homeland. The high frequency of the allele in the village probably provides an example of: a. natural selection. b. the concept of relative fitness. c. the HardyWeinberg genetic equilibrium. d. phenotypic variation. e. the founder effect.If a populations allele and genotype frequencies remain constant from generation to generation, (a) the population is undergoing evolutionary change (b) the population is said to be at genetic equilibrium (c) microevolution has taken place (d) directional selection is occurring, but only for a few generations (e) genetic drift is a significant evolutionary force
- The MN blood group is of interest to population geneticists because (a) people with genotype MN cannot receive blood transfusions from either MM or NN people (b) the MM, MN, and NN genotype frequencies can be observed directly and compared with calculated expected frequencies (c) the M allele is dominant to the N allele (d) people with the MN genotype exhibit frequency-dependent selection (e) people with the MN genotype exhibit heterozygote advantageThe phenomenon in which chance events cause unpredictable changes in allele frequencies is called: a. gene flow. b. genetic drift. c. inbreeding. d. balanced polymorphism. e. stabilizing selection.1.) Which statement below is not consistent with a population in Hardy-Weinberg equilibrium? A.) Genetic drift is occuring. B.) Random mating is occuring. C.) Population size is large. D.) Migration is not occuring. 2.) Sickel cell anemia is an autosomal recessive genetic disorder. Because individuals affected by sickle cell anemia have defective hemoglobin proteins, their blood cannot transport oxygen properly. There appears to be a relationship between the incidence of malaria and sickle cell anemia. Individuals with sickle cell anemia are carriers of the sickle cell allele have some resistance to malaria. Malaria is caused by the parasite Plasmodium and is transmitted between humans by mosquitoes.” If scientists are successful in significantly reducing or eliminating malaria, the best prediction for what will happen to the allele for sickel cell anemia in the population is that it will: A.)not be affected by the elimination by malaria. B.) increase as its selective advantage…
- 9) This chart shows the beak length of a population of finches in the Galapagos. The island was faced with a five year drought that made it difficult for birds to get water. If natural selection occurs, how would you predict the bird beak lengths to change? A) Only those with shorter beaks would survive. B) The population would not really change much. C) Only those with the longest beaks would survive. D) Those with medium-long beaks would increase most. Not Graded1. If the value of linkage disequilibrium (D) is equal to -0.25, one can infer that the alleles at the two loci are a. in repulsion. b. in coupling. c. in linkage disequilibrium. d. A and C e. None of the above 1b. Artificial selection occurs when a. the extremes of a population have a better chance to survive b. humans determine which organisms will survive and reproduce c. the organisms on one extreme of the population will have a better chance to survive than those on the other extreme d. the environment controls which organisms will survive 1c. Which of the following are some of the viruses' subversive strategies in manipulating human immune system? a. down-regulation of the expression of MHC molecules b. degradation of the immune system's chemokine signals c. both a and b d. none of the above 1d. Homeotic genes a. only specify the anterior-posterior axis for each fruit fly segment b. are found only in Drosophila and other arthropods c. encode…1. Animals that possess homologous characteristics Group of answer choices a. by chance had the same mutations in the past b. share a common ancestor that also had the characteristic c. are less related than if the characteristics were homoplastic d. evolved the characteristics independently e. are not related 2. In a population of Scrub Jays, the frequency of a recessive allele that results in short tail feathers in homozygous individuals is 0.5. When you survey the population for tail phenotypes, you find that 70 percent of adult scrub jays have short tail feathers. What is most likely true based on these numbers? Group of answer choices a.Short tail feathers appear to be neither helpful nor harmful in this population b.The population is Hardy-Weinberg equilibrium for this trait c. The short tail feathers are likely maladaptive and are allowing predators to capture the scrub-jays d. Having short tail feathers in this population is in…
- 1. A sample of 600 individuals from a population is examined for the presence of the HindIII polymorphism in an autsomal Sca gene. There are two alleles of Sca gene, A and a. The results are 14 individuals are AA, 212 are Aa, 374 are aa. Please answer the following questions accordingly? How many alleles are present in the gene pool in the sample population fort he Sca gene? What are the genotype frequencies? What are the frequencies of A and a alleles? What are the expected numbers of the three genotypes, assuming randomchoose the correct letter and explain why you choose it. 1. Which of the following is not a characteristic of a K-selected population? a. the maturation time of the young is long. b. the lifespan of the organism is long. c. there are few offspring per reproductive cycle. d. there is little parental careHello, I need help answering number 32 (Including the sub-parts) multiple choice questions. Pls and thank you! 32. A.) A selective sweep happens when: a) a new mutation increases rapidly toward fixation b) selection acts on standing genetic variation c) no linkage disequilibrium results d) fitness trade-offs exist B.) Fitness components include all the following except: a) frequency of new mutations b) probability of getting a mate c) survival to adulthood d) fecundity