Genetics problem please help the whole homework assignment is due tomorrow at 4:10 pm

Question

A researcher is interested in two important phenotypes in sorghum: stem color and seed sweetness. Use G for red stems and g for green stems. Use S for sweet seeds and s for bitter seeds. After crossing two plants red-stemmed sweet seed plants (GgSs) he observes 3/4 of the progeny being red and having sweet seeds, 3/16 being green and sweet, and 1/16 being green and bitter. What is a possible explanation for this?

Answer 1

The fractions are weird because it goes from having a 4 space Punnett square to 16 because of the inclusion of a second trait in the genotype. The majority has both dominant alleles, 3/16 has only one dominant allele. 1/16 is both recessive alleles no dominant alleles