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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.You sample the frequency of an allele in a population over 12 consecutive generations and find that the frequency of the allele changes as follows: Generation 1 2 3 4 5 6 7 8 9 10 11 12 Frequency 0.75 0.73 0.72 0.71 0.70 0.69 0.67 0.66 0.65 0.64 0.62 0.61 How would you best characterize this allele and this population? A. The allele is under selection and the population size is very small B. The allele is under selection and the population size is very large C. The allele is not under selection and the population size is very small D. The allele is not under selection and the population size is very largeIn a population that is in Hardy-Weinberg equilibrium, there are two possible alleles for a certain gene, A and a. If the frequency of allele A is 0.4, what fraction of the population is heterozygous? O A. 0.40 B. 0.60 C. 0.16 D. 0.48
- Under genetic drift, if an allele’s frequency is 1%, what is the likelihood that it will be lost from the population? part B; Construct a graph that describes the likelihood of fixation of a particular allele, for a small population that is under Wright-Fisher genetic drift. Don’t forget to label axes completely.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. 23A meadow is home to a population of plants of a particular species. Among these individuals are 125 plants that have red flowers and 375 plants that have white flowers. The allele of the flower color gene that produces red flowers (R) is completely dominant over the white flower color allele (r). What is the total number of flower color alleles in this population of plants? a- 500 b- 2 c- 375 d- 1,000 e- 4
- If the frequency of a recessive disease causing allele (q) is 0.1, what is the frequency of individuals with the disease in a population with an inbreeding coefficient of 0.25? A. 0.0225 B. 0.05 C. 0.01 D. 0.81 E. 0.0325Suppose that gene B occurs in a unicorn population where the frequency of the B1 allele is 0.5 and the frequency of the B2 allele is 0.4. What is the frequency of the B3 allele, assuming that there are only 3 alleles in the population? O The frequency of B3 = 0.1 because 0.5 +0.4+ B3 = 1. O The frequency of B3= (0.4)2 = 0.16 O The frequency of B3= 0.9 because 0.5 +0.4 = 0.9 O There is not enough information to determine the frequency of the B3In a Hardy-Weinberg population with two alleles, G and g, that are in equilibrium, 40% of the alleles are recessive. What percentage of the population is homozygous for the dominant allele? a. 9% b. 36% c. 70% d. 60% e. 30%
- A population consist of 7 mice. For the coat trait, there are only two alleles: brown B and white (b). BB and Bb mice are brown; bb mice are white. In the population's gene pool, there are 7 white alleles(b). a) what is the frequency of the brown allel in the population? b) what do you predict the frequency of the bb genotype will be in the next generation if no evolution takes place in the population?In the gene pool of a population with 100 individuals, an extinct allele for a particular gene locus has a frequency of: Group of answer choices a. 0.5 b. 100 c. 0 d. 1You have a population of 100 individuals in HW equilibrium and there are two alleles at the T locus (T and t). If there are 36 individuals in the population with genotype tt, what is the expected frequency of the t allele under HW? Group of answer choices A. 0.36 B. 0.18 C. 0.5 D. 0.6 E. 0.72