Name Pre-Lab 2: Population Genetics population of 40 Blue, 40 Green, 20 Yellow t
ID: 190682 • Letter: N
Question
Name Pre-Lab 2: Population Genetics population of 40 Blue, 40 Green, 20 Yellow tribbles. Refer to 1) Consider the starting Page Pop Gen-4 for the genotype of the blue, green and yellow tribbles. Is this population at Hardy-Weinberg Equilibrium (HWE)? Justify your answer mathematically. 2) Suppose that you wanted to simulate Natural Selection in this lab. a) What experiment could you conduct to simulate Natural Selection? What instructions would you give for that step? (You may find it useful to use the descriptions at the top of Page Pop Gen -8 as a model.) There are many correct answers here; give only one. b) Which of the experiments described on Page Pop Gen -8 simulate genetic drift? Give all the numbers that apply.Explanation / Answer
1. The answer is
Null hypothesis: The observed values are not deviating from the 1:2:1 ratio.
Test static:
Category
Green
Blue
Yellow
Total
Observed values
40.00
40.00
20.00
100
Exptected Ratio
1
2
1
4
Exprected Values
25
50
25
Deviation
15
-10
-5
D^2
225
100
25
D^2/E
9
2
1
12
X^2
12
Degrees of freedom
3-2=1
Inference: The calculated chi-square value 12 is greater than the table value i.e. 3.84 at 1 DF and 0.05 probability, hence the null hypothesis rejected.
ACCORDING TO CHEGG GUIDELINES WE HAVE TO ANSWER ONE QUESTION AT A TIME. POST THE REST AS SPERATE QUESTIONS, THEN I CAN HELP YOU.
Category
Green
Blue
Yellow
Total
Observed values
40.00
40.00
20.00
100
Exptected Ratio
1
2
1
4
Exprected Values
25
50
25
Deviation
15
-10
-5
D^2
225
100
25
D^2/E
9
2
1
12
X^2
12
Degrees of freedom
3-2=1
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