My favorite figure.
The photo really says it all. In the first second your eye is immediately drawn to just how similar the two plants look. In the second, you start to wonder about the differences between the two (the sorghum plant is way more waxy, the corn plant has a purple auricle from anthocyanins).
I want to understand the conserved genomic features that maize corn and sorghum so similar, and the subtle genetic changes that make them so different.