Is meat that has been artificially grown in a lab (made by duplicating
cells) halal?
Yes, if the materials used to produce it is halal.
What if the father cell came from a living animal?
If the father cell is taken from a living animal, then that animal must be slaughtered in line with the Islamic guidelines of slaughtering. If the father cell is taken from a pig, then it's haram. But if the father cell is taken from a cow or a goat which was slaughtered in accordance with the Islamic guidelines of slaughtering, then it is halal.
Can humans eat this kind of artificial meat?
If such meat is produced in a halal manner, then there is noting wrong with eating them.