midterm 1 - Bio20c Spring 2016 First Midterm Name/SID...

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Bio20c Spring 2016 First Midterm Name/SID Briefly name and explainthe two components of the mechanism for natural selection (4 pts)
Component 1 Malthus Component 2 Smith Consider the diagram on the right that depicts fossils of whale ancestors What term would best characterize the relationship that the middle fossil has to the top and bottom fossil? (2 pts)
As discussed in lecture, evidence supporting evolution falls into one of two main categories. Which of these two categories does the progression of fossils on the right support? (2 pts)
What term would describe the relationship between the bones in the flipper of Basilosaurus(bottom right) and the bones in the wing of a bat? (2pts)
Which category of evidence for evolution is supported by examples of this term? (2 pts)
In population with 2 alleles at locus A (A1 and A2), 60% are homozygous for A1 and 20% are homozygous for A2. What is the frequency of A1 and A2 in this population? (2 pts)
What would you predict the frequency of genotypes to be in the next generation if this population was in Hardy-Weinberg equilibrium? (2)
Bonus Question 1: briefly distinguish between the terms fitness and adaptation Fitness = relative number of offspring produced, adaptation = any trait that increases fitness
For each of the following scenarios, indicate which micro-evolutionary process is acting on the population being described. Be as specific as possible it there are sub-categories of this process identify which specific one is being described. (2 pts each) 1 House sparrows were introduced to North America in 1852. Over time, sparrow populations in the north have become larger-bodied than sparrow populations in the south, Larger-bodied birds can withstand lower temperatures than smaller-bodied birds can, and winter temperatures in the north are much lower than in the south.

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