Assume that a cross is made between a heterozygous tall pea plant and a homozygous short pea plant. fifty offspring are produced in the following frequency: 30= tall and 20= short. a) what frequency of tall and short plant is expectedb) if one wanted to test the goodness of fit between the observed and expected values, provide a statement of the null hypothesis. c) compare a chi-square value associated with this appropriate test of significance. d) how many degrees of freedom are associated with this test of significance?