(a) full pods 845
constricted pods 336
B) violet flowers 687
white flowers 242
http://session.masteringgenetics.com/problemAsset/1440418/16/MG_1440418_001.jpg* this is the image to look at*
1) The results of two of Mendel's crosses are shown. You want to calculate the χ2 value and determine the p value for both crosses.
What is the null hypothesis to be tested using χ2 analysis?
A) There is no difference between the observed values and expected values for a monohybrid cross; the data fits a 3:1 ratio.
B) There is a difference between the observed values and expected values for a monohybrid cross; the data does not fit a 3:1 ratio.
2) What is the expected value of full pods?
Remember that expected values do not have to be whole numbers.
Express your answer to two decimal points (example: 100.00).
3) What is the expected value of white flowers?
Remember that expected values do not have to be whole numbers.
Express your answer to two decimal points (example: 100.00).
4) What is the χ2 value for cross (a)?
Express your answer to two decimal points (example: 100.00).
5) What is the χ2 value for cross (b)?
Express your answer to two decimal points (example: 100.00).
6) How many degrees of freedom (df) are there for each χ2 test?
Your answer should be a whole number (example: 5).
7) Can the deviation of observed values from expected values in cross (a) be attributed to random chance?
No or Yes
Use the probability chart to answer this question.
8) Can the deviation of observed values from expected values in cross (b) be attributed to random chance?
No or Yes
Use the probability chart to answer this question.
9) Which of the two crosses shows a greater amount of deviation from the expected values?
a) The cross with the smaller χ2 value.
b) The cross with the larger χ2 value.
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