One way is to eg: two sheep. If you take and egg from the sheep and sperm from a sheep. Then u extract te DNA u want and put it into an empty egg cell. This then gets inserted into a mother and the baby sheep will be born.
The second option is to take just a female egg. And take all the DNA from that and then you will have an exact replica.
Or you just have inbred a family. They will all be very similar but it will cause a few defects.
Hope this helps :-)