How do scientists grow an ear in a petri dish?

Question

OK this might be a stupid question but i've seen ears and noses being grown by scientists in a laboratory in petri dish or a nose being grown on someones one arm to replace the one that they lost. SO, how do they do it? in layman's terms please.

Answer 1

Indeed, ears are grown and hosted not in a petri dish, but on mice. Getting an organ to attach where it belongs and get the circulation working right is another story. More recently, a p***s was grown in a petri dish. It is done by manipulating an undifferentiated cell. There is a point in cell replication/reproduction when cells are not yet programmed to be a specific part of the organism and can be engineered genetically. If I'm not mistaken, Dolly the sheep was a clone created by inserting the nucleus of a sheep's udder cell into an egg cell that had the nucleus removed. There was no fertilization, just a combination of a skin cell and an s*x cell.