Question

In peas, an allele for tall plants (T) is dominant over the allele for short plants (t). An allele of another independent gene (i.e, this gene is not located on the same chromosome as the gene for tallness) produces smooth peas (S) and is dominant over the allele for wrinkled peas (s). Calculate both the phenotypic ratios & gentypic ratios for the results of each of the following crosses.

TtSs x TtSs
Ttss x ttss
ttSs x Ttss
TTss x ttSS