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Utah Valley University *

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1010

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Biology

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Dec 6, 2023

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Exam Rewrite Question 1 You try to start your car, but it does not start. Which of these is a hypothesis? My car's battery is dead. This the correct answer because it is a prediction for the observed issue having some knowledge we can say that is because my car’s battery is dead Question 2. What does Darwinian fitness measure? Darwinian fitness measures reproductive success. It quantifies an individual's ability to survive, reproduce, and pass on its genes to the next generation. Question 3.I have just arrived on another planet in a distant galaxy. I stumble upon things I think are living organisms. Which of the following is/are evidence(s) that they are alive? (select all that apply) Question 4. Based on the information provided, the following are evidence(s) that the organisms you have encountered may be alive: 1. The tissue I scraped off of them seems to be made of cells. Cells are a fundamental unit of life, and the presence of cells is a strong indication of life. 2. They are various sizes (suggesting some have grown larger than others).Variation in size among organisms suggests growth and development, which are characteristics associated with living organisms. Question 5. Which of the following circumstances describe a situation in nature where genetic drift most likely is a more important influence on evolution than natural selection (Mark all that apply). 1. A reduction in population size - from a large to a much smaller.Genetic drift tends to have a more pronounced effect in smaller populations where random changes in allele frequencies can occur without the overwhelming influence of natural selection. 2. A small group of individuals from a parent population initiates a new population.This situation is known as the founder effect, where a small subset of the original population establishes a new population. In this case, the genetic makeup of the new population can be significantly influenced by the alleles present in the founding individuals, and genetic drift can play a prominent role. 3. A hurricane drives the reduction in population size.Similar to the first scenario, a reduction in population size caused by a natural disaster like a hurricane can lead to genetic drift, as the smaller post-disaster population may exhibit different allele frequencies due to random chance.

Question 6. A species of black birds has a mutation that caused a streak of red in the feathering of some individuals. This streak of red leads to females preferentially choosing males with this mutation. What form of mating is this and what sort of selection will this display? The form of mating described in the scenario is non-random mating, specifically sexual selection where females preferentially choose males with a specific trait, in this case, a red streak in the feathering. Question 7. Suppose we use a computer to simulate genetic drift (like we did in class). Assume a population size 100, with an initial allele frequency of 0.2 and we let the simulation run for 1000 generations. Predict (at generation 0, before you push go) what will be the most likely outcome after the simulation has finished (at generation 1000)? Here is a link to the simulator if you think that will help: http://www.radford.edu/~rsheehy/Gen_flash/popgen/ It WILL GO TO 80% FIXATION. I DID THE SIMULATION ON THE WEBSITE

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