Principles of Biology 2 practice Use the x\' test to determine if the following
ID: 187717 • Letter: P
Question
Principles of Biology 2 practice Use the x' test to determine if the following situations meet predicted expectations. Do any other ratios fit? For the following problems, assume that you are looking at a monohybrid cross. 1. You are looking at flower color. Your F2 generation has 3089 Red flowers and 1110 white flowers. 2. You are looking at pea color. Your F2 generation has 275 green and 99 yellow peas. 3. You are looking at corn kernels. Your F2 generation has 675 purple and 596 yellow. For the following problems, assume you are looking at a dihybrid cross. 4. You are looking at corn kernels again. Your F2 generation has 906 purple, smooth; 312 purple, wrinkled; 298 yellow, smooth; and 98 yellow wrinkled 5. You are looking at peas again. Your F2 generation has 800 green, smooth; 400 green, wrinkled; 500 yellow, smooth; and 150 yellow, wrinkled For the last problems, you are looking at a monohybrid cross. The trait is flower color, but there is incomplete dominance. 6. Your F2 generation has 100 red flowers, 200 pink flowers, and 100 white flowers 7. Your F2 generation has 150 red flowers, 150 pink flowers, and 100 white flowersExplanation / Answer
1. The answer is
Null hypothesis: The observed values are not deviating from the expected ratio i.e. 3.1.
Test static – Chi square:
Category
Red
White
Total
Observed values
3089
1110
4199
Exptected Ratio
3
1
4
Exprected Values
3149.25
1049.75
Deviation
-60.25
60.25
D^2
3630.063
3630.063
D^2/E
1.152675
3.458026
4.610701
X^2
4.61
Degrees of freedom
-
1
Inference: The calculated chisquare value i.e 4.61 Is greater than the table value i.e.3.84 at 1 DF and 0.05 probability, hence the null hypothesis is rejected.
2. The answer is
Null hypothesis: The observed values are not deviating from the expected ratio i.e. 3.1.
Test static – Chi square:
Category
Green
Yellow
Total
Observed values
275
99
374
Exptected Ratio
3
1
4
Exprected Values
280.5
93.5
Deviation
-5.5
5.5
D^2
30.25
30.25
D^2/E
0.107843
0.323529
0.431373
X^2
0.43
Degrees of freedom
-
1
Inference: The calculated chisquare value i.e 0.43 is lessthan the table value i.e.3.84 at 1 DF and 0.05 probability, hence the null hypothesis is accepted.
3. The answer is
Null hypothesis: The observed values are not deviating from the expected ratio i.e. 1.1.
Test static – Chi square:
Category
Purple
Yellow
Total
Observed values
675
596
1271
Exptected Ratio
1
1
2
Exprected Values
635.5
635.5
Deviation
39.5
-39.5
D^2
1560.25
1560.25
D^2/E
2.455153
2.455153
4.910307
X^2
4.91
Degrees of freedom
-
1
Inference: The calculated chisquare value i.e 4.91 is greater than the table value i.e.3.84 at 1 DF and 0.05 probability, hence the null hypothesis is 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
Red
White
Total
Observed values
3089
1110
4199
Exptected Ratio
3
1
4
Exprected Values
3149.25
1049.75
Deviation
-60.25
60.25
D^2
3630.063
3630.063
D^2/E
1.152675
3.458026
4.610701
X^2
4.61
Degrees of freedom
-
1
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