Chi-Square Analysis 13. In fruit flies, red eyes (R) are dominant over white eye
ID: 188391 • Letter: C
Question
Chi-Square Analysis 13. In fruit flies, red eyes (R) are dominant over white eyes (. A student performs a cross between a het and 49 white-eyed Flies. e-eyed e ite-eyed fly. The student counts the offspring and finds 65 red-eyed flies a. what is the expected phenotypic ratio of this cross? Li- b. Using a y test, determine whether the deviation between the observed and the expected is the s 7 result of chance. (br-r- esn.aaS c. Conclusion 14. In fruit flies, gray body (G) is dominant over ebony body (g) a. A red-eyed, gray-bodied fly known to be heterozygous for both traits is mated with a white-eyed b. The observed offspring consist of 15 white-eyed, ebony-bodied flies 81 white-eyed, gray c. Is it likely that the observed results "ft the expected values? fly that is heterozygous for body color What is the expected phenotyple ratio for this mating? 2:2 fies; 12 red-eyed, ebony-bodied flies, and 38 red eyed, gray-bodied fies. what is the value for this cross?-4R Color adess is a sx-lnkes tat ssa anarma bay IS 131t 12+39Explanation / Answer
a. The exprected phenotypic ratio of this cross is 1:1.
b. Null hypothesis: The observed values are not deviating from the expected ration i.e. 1:1.
Test static:
Category
Red
White
Total
Observed values
65
49
114
Exptected Ratio
1
1
2
Exprected Values
57
57
Deviation
8
-8
D^2
64
64
D^2/E
1.122807
1.122807
2.245614
X^2
2.25
Degrees of freedom
-
1
c. Conclusion or Inference: The calculated chisquare value i.e. 2.25 is less than the table value i.e. 3.84 at 1 DF and 0.05 probability, hence the null hypothesis is accepted.
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
65
49
114
Exptected Ratio
1
1
2
Exprected Values
57
57
Deviation
8
-8
D^2
64
64
D^2/E
1.122807
1.122807
2.245614
X^2
2.25
Degrees of freedom
-
1
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