Question

starchy grain is dominant over sugary grain in corn. If, in a cross between these types, 58 of the progeny are sugary, how many of the progeny should be starchy? *there is only one possible answer to this problem.

Answer 1

in the offspring of crosses between sweet and waxy ... and pops where only one kind of pollen was used was twenty-one. ... clear that there is a larger air cavity in such grains but of all kernels intermediate. ... generations from crosses between sugar and starch

Answer 2

I think it should be 58. See as follows:
Starchy Grain(Ss) * Sugary Grain(ss) [Both r crossed]

So, we get, Ss : Ss : ss : ss = 2 : 2 = 1: 1

Hope I am right. Kindly get it confirmed.

Answer 3

Aadarsh is right.

This question is very similar (i.e., the same, except for differently named alleles) asked (and answered) here:

http://openstudy.com/study#/updates/4f46d8b5e4b065f388de35ce