In chi square analysis you counted following corn kernels (observed data) in an

Question

In chi square analysis you counted following corn kernels (observed data) in an ear of corn for the monohybrid cross: Cross: monohybird Dominant: Purple: 290 kernels Recessive: White: 110 kernels What is the anticipated ratio of the above-mentioned experiment that you would apply for the Chi-Square Analysis? a. 3: 1 b. 1: 1 c. 1: 2: 1 d. 9: 3: 3: 1 What is the expected PURPLE corn kernel number? a. 100 b. 200 c. 300 d. 400 What is the expected WHITE corn kernel number? a. 100 b. 200 c. 300 d. 400 What is the degree of freedom in the above-mentioned experiment? a. 1 b. 2 c. 3 d. 4 Fill out the numbers and find out Chi-Square Number: This area is not graded, so use this for your calculations: Chi square table:

Explanation / Answer

Answer:

17). a. 3:1

Monohybrid cross phenotypic ratio is 3:1

18). c. 300

Of the above 3 : 1 ratio, 3 is dominant ratio and 1 is recessive ratio. Total progeny is 400, so dominant progeny is 3/4 *400 = 300

19). a. 100

Of the above 3 : 1 ratio, 3 is dominant ratio and 1 is recessive ratio. Total progeny is 400, so recessive expected progenyis 1/4 *400 = 300

20). a. 1

Degrees of freedom = number of phenotypes - 1

DF = 2-1 = 1

DF=1

Chi-square value = 1.333

Phenotype Observed(O) Expected (E) O-E (O-E)2 (O-E)2/E Purple 290 300 -10 100.00 0.33 white 110 100 10 100.00 1.00 400 400 1.333

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