Two pea plants heterozygous for the characters of pod color and pod shape are crossed. Assume that G allele stands for green pod color, g allele−for yellow pod color, I allele−for inflated pod shape, and i allele−for constricted pod shape. Complete the Punnett square for this cross.

Please find the punnet square in the attachment section

Explanation:

This question involves two different genes; one coding for pod color and the other for pod shape. The allele for green pod color (G) is dominant over the allele for yellow pod color (g) while the allele for inflated pod shape (I) is dominant over the allele for constricted pod shape (i).

According to this question, two pea plants heterozygous for both of the characters or traits are crossed i.e. GgIi × GgIi. Each heterozygous parent will produce the following possible gametes:

GgIi - GI, Gi, gI and gi.

Using these gametes in a punnet square (see attached image), the following proportion of offsprings will be produced:

- Green, inflated pods (G_I_) = 9

- Green, constricted pods (G_ii) = 3

- Yellow, inflated pods (ggI_) = 3

- Yellow, constricted pods (ggii) = 1