Thanks Caryl, the first link is helpful if you're wanting grounding or refreshing in genetics & for pics of colours, & the second said Yellow and Gold are more recessive, and a little on the black. While both sites are very interesting, what I am wanting is more info specifically on colour genes? ie people with blue eyes. Blue is more recessive than brown, so, if the brown eyed person doesn't have an ancestor with blue eyes, the babies eyes will be brown - simplified- but surely there is something similar for guppies like a chart or something? Jane