A dihybrid testcross is made between genes H and I.Four categories of offspring are produced: H I, H i, h I, and h i.How many degrees of freedom would there be in a chi-square test for goodness of fit of the null hypothesis that the H and I genes are unlinked?
A)1
B)2
C)3
D)4
E)0

Question

Quizplus · Accepted Answer

The degrees of freedom for a chi-square test in this context are calculated as the number of categories minus 1. Since there are four categories of offspring (H I, H i, h I, h i), the degrees of freedom would be 4 - 1 = 3.

A Dihybrid Testcross Is Made Between Genes H and I