Radish flowers may be red, pink, or white. the part of the radish we eat may be oval or long. a cross between a red-flowered long radish plant and a white-flowered oval radish plant yields all pink-flowered long radish offspring. when the f1 are cross, the what proportion of the f2 generation would be expected to be pink-flowered long radish plants?

Let's suppose that "long" is the dominant allele and  "oval" is the recessive allele.
let's suppose also that red + white genotype give a pink phenotype
every radish has 2 genotypes for each gene, one from the mother and one from the father

The proportions are: if the radish are homozygotes 
red red; long long  x  white white ; oval oval
red white oval long  ; red white oval long  ; red white oval long  ; red white oval long
We will have 100% of pink - long radish.

A crossmatch from homozygotes species give always a unique phenotype

That is false even though water expands when frozen nothing changes at all