Artificial dyes made using chemicals and are thus regulated by the Food and Drug Administration to ensure their safety. But ...

Your eyes might be red because of dry eyes caused by contact ... You'll also likely experience white, green, or yellow fluid discharge from the eye. "[Pink eye] can vary from mild pink to frank ...

If you are given a male with a yellow body and red eyes, how can you determine its genotype? In this example, there are now four possible genotypes that are associated with the dominant phenotype ...