Read the description below.

Some people can taste PTC (a very bitter substance), while others cannot. The ability to taste this substance is controlled by a single gene. The alleles for tasting PTC are shown with the letter T. The ability to taste PTC is dominant.

Ben’s mom has a heterozygous genotype for the PTC-tasting gene. Ben’s dad cannot taste PTC.
Which Punnett square correctly shows Ben’s parents?