So the first step of synapses is the following. These two homologous pairs of chromosomes that we spoke of earlier actually have to find each other and move side by side. And then when they move side by side, these chromatids of these two chromosomes have to overlap. They have to intertwine, as shown in the following diagram. So during the process of synapses, the point at which our two chromatids intertwine, or overlap, is known as our chiasma. And in this diagram, the chiasma is basically this point here.