Is the ratio of observed phenotypes the same as the ratio of predicted phenotypes? why or why not? 5. pool all of the offspring from your five replicates. how much phenotypic variation do you find? 6. what is the difference between genes and alleles? 7. how might protein synthesis execute differently if a mutation occurs? 8. organisms heterozygous for a recessive trait are often called carriers of that trait. what does that mean? 9. in peas, green pods (g) are dominant over yellow pods. if a homozygous dominant plant is crossed with a homozygous recessive plant, what will be the phenotype of the f1 generation? if two plants from the f1 generation are crossed, what will the phenotype of their offspring be?