In garden peas, the allele for tall plants (t) is dominant over the allele for dwarf plants (t). a true-breeding tall plant is bred with a true-breeding dwarf plant to produce heterozygous tall plants. the f1 heterozygotes then self-fertilize to yield f2 offspring. complete the punnett square for this monohybrid cross using the f1 gametes with the appropriate genotype and placing the correct f2 genotype/phenotype combination in the punnett square.