The two punnet squares represent incomplete dominance and codominance. These are both types of inheritance where one allele is not completely dominant over the other allele resulting in a new phenotype.

In incomplete dominance blending of the two alleles occurs resulting in a phenotype that does not look like the parents. A cross between a white flower and a red flower produced all the offspring that are solid pink flowers due to incomplete dominance.

In codominance, in the offsprings, both alleles are expressed together. If a cross is done between red flower and white flower, the flowers of the offspring would be with red and white patches on them.