Posted: 10/12/2013 at 21:17
Many citrus seeds contain two types of embryos. The nucellar embryo is identical to the mother, and there is another embryo that contains genetic material from both parents. Normally the two parent embryo is dominant. it is possible to separate the two and grow the nucellar emrbryo, which will them be identical to the fruit that the seed has come from, but I'm afraid that is beyond me. I think it will require some clever disection.
I have grown citrus from pips, but never got them to fruit. Fruiting plants that you can buy are grafted.