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From a monohybrid cross, you have generated 100 offspring. 70 of them have the dominant phenotype,...

From a monohybrid cross, you have generated 100 offspring. 70 of them have the dominant phenotype, while the remaining 30 have the recessive phenotype. What is the X^2 value?

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Answer #1

Null hypothesis: The observed values are not deviating from 3:1 ratio.

Test static – Chi square test:

Category

Red

White

Total

Observed values

70

30

100

Exptected Ratio

3

1

4

Exprected Values

75

25

Deviation

-5

5

D^2

25

25

D^2/E

0.333333

1

1.333333

X^2

1.33

Degrees of freedom

-

1

Inference: The calculated chisquare value i.e. 1.33 is lessthan the table value i.e. 3.84 at 1 DF and 0.05 probability, hence the null hypothesis is accepted.

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