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 50, Problem 8TYU
Summary Introduction
Introduction:
Altruism is the selfless behavior shown by an individual that encourages it to help others. As per Hamilton’s rule, an altruistic gene can spread in a population only when the product of fitness benefit
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> 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…
Write the survivor rate for AA and Aa genotypes (write the answer in decimal numbers, not in fractions)
Survivor rate of AA=
Survivor rate of Aa=
Write the absolute fitness for AA and Aa genotypes (write the answer including two decimal
figures)
Absolute fitness (W) of AA=
Absolute fitness (W) of Aa=
Write the relative fitness for AA and Aa genotypes (write the answer in decimal numbers, include two decimal figures)
Relative fitness (w) of AA=
Relative fitness (w) of Aa=
asap please.
You observe some bark beetles with different feeding behaviors. You find that the behavioral phenotypes you observed are closely associated with the following genotypes.
genotype
phenotype
number observed
BB
feeds under bark
60
Bb
feeds on top of bark
24
bb
feeds on leaves
16
a) What are the allele frequencies and the expected number (out of 100 beetles) of genotypes?
b) Calculate the Chi-Squared value (c2). Then look up the p-value using this Chi-squared calculator: https://www.mathsisfun.com/data//chi-square-calculator.html
Enter “1” for Degrees of Freedom. (There are 3 genotype categories, but only 1 DF because they are not fully independent—calculated from just 2 allele frequencies). The p-value is the probability that you would see the deviance you observed by chance, assuming the null hypothesis is true). Report both values. Is the population in H-W equilibrium?
c)
If you answered “No” to b): Provide at least three biologically…
Chapter 50 Solutions
Biological Science (7th Edition)
Ch. 50 - Prob. 1TYKCh. 50 - Prob. 2TYKCh. 50 - Prob. 5TYUCh. 50 - Propose an evolutionary hypothesis to explain the...Ch. 50 - Prob. 8TYUCh. 50 - 10. J. B. S. Haldane once remarked that he’d be...Ch. 50 - Prob. 11PIATCh. 50 - Researchers followed tagged blue whales to observe...Ch. 50 - Prob. 13PIATCh. 50 - Prob. 14PIAT
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- Which is the correct equation for the chisquare statistic? Group of answer choices a)x^2 = [(observed-expected)^2]/expected b)x^2 = sum[((observed-expected)^2)/observed] c)x^2 = sum[((observed-expected)^2)/expected] d)x^2 = sum[(observed-expected)/expected] What is a "p-value"? Group of answer choices a)the threshold at which you will reject the null hypothesis b)the probability of the null hypothesis being false c) the percentage of days you are sick during the year d) the probability of the null hypothesis being truearrow_forwardYou observe some bark beetles with different feeding behaviors. You find that the behavioral phenotypes you observed are closely associated with the following genotypes. genotype phenotype number observed BB feeds under bark 60 Bb feeds on top of bark 24 bb feeds on leaves 16 a) What are the allele frequencies and the expected number (out of 100 beetles) of genotypes? b) Calculate the Chi-Squared value (c2). Then look up the p-value only using this Chi-squared calculator: https://www.mathsisfun.com/data//chi-square-calculator.html Clear all the values in the box at upper right, enter the Chi Square value that you obtain FROM YOUR CALCULATIONS in the Chi-Square box, and enter 1 for the degrees of freedom. Is the population in H-W equilibrium? c) If you answered “No” to b): Provide at least three biologically valid reasons why the observed beetle population may not be in equilibrium. If you answered “Yes” to b): Why do you think this…arrow_forwardCerebellar abiotrophy (CA) is a recessive, genetic neurological disease found in the Arabian horse breed. If the incidence of this disease is about 1 in 400 Arabian horses, estimate the frequency of carriers in a population in Hardy-Weinberg equilibrium. Value of q²: 0.0025 Value of q: 0.05 Value of p: 0.95 Carrier Frequency: 0.095 How many horses would you expect to be carriers for cerebellar abiotrophy if the population consists of 582 Arabian horses? (Round to the nearest whole number and enter 2 digits.)arrow_forward
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