Question

[1.] You are studying hyperactivity and learning ability in mice. You have developed two true-breeding strains of mice, one that is hyperactive but a slow learner, another that is lethargic but a fast learner. The distributions of activity levels and learning ability in 500 F2 mice are listed below:

311 hyper & slow
65   hyper & fast     
64   lethargic & slow
60   lethargic & fast

Note: hyperactive > lethargic and slow > fast

Under the assumption of independent assortment, how many hyperactive and fast learners do you expect?

A. 281.25

B. 93.75

C. 31.25

D. 64

[2.]

Calculate the chi-square value to test the hypothesis that these two genes are assorting independently.

Group of answer choices

A. 3.84

B. 42.55

C. 3.0

47.86

Answer 1

With 3 degree of freedom and chi square value equal to 6.84 probability is less than 0.10 .

Thus rejecting the null hypothesis .

There is a problem with the options of question 2 . Hope you will be able to understand the correct solution.