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Biol 320 Final Exam Newest 2025 Actual Exam Complete Questions And Correct Answers (Verified Answers) |Already Graded A+
In sexually reproductive organisms, mutations must occur in the _______ in order to be passed on to the next generation. - ANSWER-gametes
When researchers grown C. elegans in environments free of Natural Selection (i.e., no competition for resources), the overall fitness of the population is observed to decrease over many generations. In environments where Natural Selection is operating (i.e., competition for resources exists), the fitness of the population is observed to remain constant over many generations. What do these findings suggest about mutations? - ANSWER-That most mutations are at least slightly deleterious, and Natural Selection operates to remove such mutations from the population.
Point mutations that substitute a purine for a purine (or a pyrimidine for a pyrimidine) are referred to as _______, while point mutations that substitute a pyrimidine for a purine (and vice versa) are termed _______. - ANSWER-transition 1 / 3
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transversion
Given the allele frequencies below, what would be the expected genotype frequencies in the next generation assuming all assumptions of the Hardy-Weinberg Equilibrium Principle are being met? (Assume allele A = p, and allele a = q)
Allele Frequencies:
p = 0.72
q = 0.28 - ANSWER-Genotype Frequencies:
AA = 0.52
Aa = 0.40 aa = 0.08
What are the assumptions of the Hardy-Weinberg Equilibrium Principle? - ANSWER-No mutations are occurring (i.e., no new alleles are being created).No natural selection is operating on the population.Mating is random.There is no movement of alleles into or out of the population.The population is large - no genetic drift is occurring. 2 / 3
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What are true of the process of retroposition and the resulting duplicated genes? - ANSWER-Involves reverse transcription of mRNA back into DNA.Includes integration of reverse transcribed DNA back into the genome.Can often be recognized by the presence of region that codes for a poly-A tail.
The term _______ refers to the physical manifestation of a genotype. - ANSWER-phenotype
Given the genotype frequencies below, determine the observed frequencies of the two alleles in the population (p and q).Assume the population consists of 100 individuals, and that B = p and b = q.
Observed Genotype frequencies:
BB = 0.39
Bb = 0. 40
bb = 0.21 - ANSWER-Observed Allele frequencies:
p = 0.59
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