Biological Science (7th Edition)
7th Edition
ISBN: 9780134678320
Author: Scott Freeman, Kim Quillin, Lizabeth Allison, Michael Black, Greg Podgorski, Emily Taylor, Jeff Carmichael
Publisher: PEARSON
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Chapter 23, Problem 13PIAT
Do these data illustrate directional, stabilizing, disruptive, or balancing selection? Justify your answer in terms of fitness.
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Chapter 23 Solutions
Biological Science (7th Edition)
Ch. 23 - PROCESS OF SCIENCE In what sense is the...Ch. 23 - 2. Why isn’t inbreeding considered an evolutionary...Ch. 23 - 4. True or false? Gene flow can either increase or...Ch. 23 - 6. In the 1700s and 1800s, royalty in Europe often...Ch. 23 - MODEL Draw a small concept map (BioSkllls 12 )...Ch. 23 - 9. QUANTITATIVE In humans, albinism is caused by...Ch. 23 - Prob. 10TYPSSCh. 23 - Are toucans important to tropical forests? Human...Ch. 23 - QUANTITATIVE Toucans can eat fruits with large...Ch. 23 - 13. Do these data illustrate directional,...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- Consider a finite population in which individuals carry two alleles at a particular genetic locus. One of the two alleles is currently at a frequency of 0.42 in the population. If the locus is neutral, such that neither allele confers a fitness advantage, what is the probability that this allele is eventually lost from the population?arrow_forwardWhat is Darwinian fitness? What types of characteristics canpromote high fitness values? Give several examples.arrow_forwardAssume you are studying a population of fire toads and want to predict what happens after a selection event. There is a freeze event. Before the freeze event you measured body size and found the average body size was 50 grams. After the freeze event you measured the surviving toads and their average body size was 70 grams. Based on your previous studies you know that the narrow-sense heritability is 0.5 What is the response to selection in this population? a. 5 grams b. 10 grams c. 20 grams d. None of the abovearrow_forward
- Say, I have two offspring of my own and also three nephews in Michigan who I have never interacted with at all. Using this as a complete set of my relative (descendants who I share genes with), my actual inlclusive fitness is O 1.75 fitness untis 1.5 fitness units O 1 fitness unit 0.5 fitness unitsarrow_forwardUnder which of the following scenarios would variation be maintained? Selection acting on a dominant high fitness allele Selection acting on a recessive high fitness allele Selection favoring heterozygotes Selection acting against heterozygotes None of the abovearrow_forwardUsing the concept of inclusive fitness (and kin selection), explain how altruistic behavior (e.g. where an individual protects for another, even at their own expense) can evolve by natural selection? Make sure to explain what inclusive fitness is. (remember the concentric circles on the slide)arrow_forward
- What is meant by "relative fitness"?arrow_forwardResistance to the poison warfarin is a genetically determined trait in rats. Homozygotes carrying the resistance allele (WRWR) have a lower fitness because they suffer from vitamin K deficiency, but heterozygotes (WRWS) do not have this deficiency. However, the heterozygotes are still resistant to warfarin. In an area where warfarin is applied, a heterozygote has a survival advantage. Due to warfarin resistance, a heterozygote is also more fit than a homozygote (WSWS) that is sensitive to warfarin. If the relative fitness values for WRWS, WRWR, and WSWS individuals are 1.0, 0.37, and 0.19, respectively, in areas where warfarin is applied, calculate the allele frequencies at equilibrium. How would this equilibrium be affected if the rats were no longer exposed to warfarin?arrow_forwardI expect for genetically identical animals that have been reared in similar conditions to have a smaller SD for any parameter that I decide to measure compared to genetically diverse animals that have been grown in a variety of natural environments.arrow_forward
- > Within a certain population, there are exactly 2 alleles at the T locus: T and t. Among the entire population, 30% of the alleles are T. If this population is in Hardy Weinberg equilibrium, what proportions (or percentages, however, you want to express it) will be TT, Tt, and tt? Show work. In a population, there are 75 TT individuals, 25 Tt individuals, and 250 tt individuals. What are the frequencies of T and t? Show work. What are the "expected" numbers of each genotype? Show work. Ís this population in Hardy Weinberg equilibrium? (don't do Chi², just compare your answer in a) b) c) part b io actual and it should be obvious.) ) Assume that, in a population of deer, two alleles exist for eye color. BB deer have blue eyes, Bb deer have purple eyes, and bb deer have red eyes. Out of a population of 1000 deer, 490 have blue eyes. You took notes on the amount of red and purple eyed deer, but your notebook fell in the mud and those numbers are obscured. However, if the population is in…arrow_forwardIf both mutation and drift are acting simultaneously, predict how this will influence variation in that population. Will variation increase, decrease, or be maintained at some equilibrium, etc.? (note: consider how mutation and drift each affect variation within a population).arrow_forwardYou are working with a group of plants and are trying to take the first step in understanding whether they are in Hardy Weinberg equilibrium. Determine the number of dominant alleles in the population, given that there are 100 homozygous dominant individuals 23 homozygous recessive individuals and 47 heterozygous individuals.arrow_forward
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