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 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 might be the case?
You observe some bark beetles with different feeding behaviors. You find that the behavioral
|
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 might be the case?
Traits are the features that are unique to specific individuals . It is represented by Genotype.
As per the question , there are three genotypes:-
i ) BB ( feeds under bark)
ii) Bb( feeds on top of bark)
iii) bb ( feeds on leaves)
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Where did you get the table chi square value of 3.84 from?
by Bartleby Expert
