A variety of pure-breeding snapdragons produces a tail plant with green seeds (W
ID: 226315 • Letter: A
Question
A variety of pure-breeding snapdragons produces a tail plant with green seeds (WWSS). A second variety of pure-breeding snapdragons produce a short plant with white seeds (wwss). The two varieties are crossed, and the resulting seeds are collected. All of the seeds are green and when planted, they produce all tall plants (WwSs). These tall F1 plants are allowed to self-fertilize. The results for seeds and plant height in the F2 generations are as follows, What is the X^2 value, and the degrees of freedom for this experiment? X^2 = 3.1, df = 1 X^2 = 3.1, df = 3 X^2 = 52.6, df = 1 X^2 = 3.1, df = 4 X^2 = 52.6, df = 4 X^2 = 52.6, df = 3 In the process of DNA purification, what is the purpose of adding ethanol? Remove chromatin proteins associated with the DNA Pull water from the DNA molecule to allow the DNA to precipitate from the solution Destroys the cell plasma membrane and nuclear envelope To interact with the negative charges of the phosphate groups in the DNA to neutralize its charge.Explanation / Answer
The answer is Chisquare values is 3.1 and Degrees of freedom = 3.
Find the below solution
Category
Green, Tall
White, Tall
Green, short
White, short
Total
Observed values
565
180
180
75
1000
Exptected Ratio
9
3
3
1
16
Exprected Values
562.5
187.5
187.5
62.5
Deviation
2.5
-7.5
-7.5
12.5
D^2
6.25
56.25
56.25
156.25
D^2/E
0.011111
0.3
0.3
2.5
3.111111
X^2
3.111111
Degrees of freedom
No. of categories - 1
4-1 = 3
Category
Green, Tall
White, Tall
Green, short
White, short
Total
Observed values
565
180
180
75
1000
Exptected Ratio
9
3
3
1
16
Exprected Values
562.5
187.5
187.5
62.5
Deviation
2.5
-7.5
-7.5
12.5
D^2
6.25
56.25
56.25
156.25
D^2/E
0.011111
0.3
0.3
2.5
3.111111
X^2
3.111111
Degrees of freedom
No. of categories - 1
4-1 = 3
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