To illustrate this example, I will use Emeril and examine the presence of torso spikes. According to the Punnet Square, his offspring would have the phenotype of either torso spikes present or no torso spikes present. When Emeril mates with Dave, who has torso spikes, the offspring (Gatch) has torso spikes as well. However, when Emeril mates with Elvis, who has no torso spikes, both offspring (Krycek and Hermione) do not have the torso spikes.

Only in a Biology final...

And today's tangent: It's Bonnie Wright! Oh, wait. I already had a tangent today, didn't I? Strag.