Pod color and pod shape were two other traits Mendel was interested in. Set up a dihybrid cross for these two traits. Note: Green pods are dominant over yellow pods and inflated pods are dominant over constricted pods.

-Start off with both parents as heterozygotes/hybrids for BOTH genes and assume the genes are located on different chromosomes.
-Determine the genotypes AND phenotypes of the offspring.

To set up a dihybrid cross, we need to determine the genotypes of the parental generation (P generation) and then use Punnett squares to predict the genotypes and phenotypes of the offspring (F1 generation).

Given that both parents are heterozygotes for both traits and the genes are located on different chromosomes, let's represent the traits as follows:
- Pod color: Green (G) is dominant over yellow (g)
- Pod shape: Inflated (I) is dominant over constricted (i)

The genotypes of the parents (P generation) would be:
- Parent 1: GgIi (heterozygous for both traits)
- Parent 2: GgIi (heterozygous for both traits)

To determine the possible genotypes of the offspring (F1 generation), we can use a dihybrid Punnett square. We need to consider all possible combinations of the alleles from the parents.

First, let's distribute the alleles for pod color:
- Parent 1: GgIi (Gg from Parent 1)
- Parent 2: GgIi (GG from Parent 2)

Next, let's distribute the alleles for pod shape:
- Parent 1: GgIi (Ii from Parent 1)
- Parent 2: GgIi (II from Parent 2)

Now, let's create a 4x4 Punnett square where each box represents a possible combination of alleles from the parents:

G G G g G g G g
I I GI GI GI GI GI GI GI GI
i i Gi Gi Gi Gi Gi Gi Gi Gi

I i GI GI GI GI GI GI GI GI
i i Gi Gi Gi Gi Gi Gi Gi Gi

I i GI GI GI GI GI GI GI GI
i i Gi Gi Gi Gi Gi Gi Gi Gi

I i GI GI GI GI GI GI GI GI
i i Gi Gi Gi Gi Gi Gi Gi Gi

For the genotypes of the F1 offspring:
- 9 boxes out of 16 show the genotype GGIi (green, inflated pods)
- 3 boxes out of 16 show the genotype GGii (green, constricted pods)
- 3 boxes out of 16 show the genotype ggIi (yellow, inflated pods)
- 1 box out of 16 shows the genotype ggii (yellow, constricted pods)

Therefore, the genotypic ratio of the F1 offspring would be:
- 9:3:3:1

For the phenotypes, we can simplify the genotypic ratios to predict the phenotypic ratios of the offspring. In this case:
- 9 out of 16 offspring would have green, inflated pods
- 3 out of 16 offspring would have green, constricted pods
- 3 out of 16 offspring would have yellow, inflated pods
- 1 out of 16 offspring would have yellow, constricted pods

Therefore, the phenotypic ratio of the F1 offspring would be:
- 9:3:3:1 (green inflated: green constricted: yellow inflated: yellow constricted)