I have a very brief question. My wife and I knew that our daughter was pregnant. Yesterday she had her first ultrasound and was able to find out whether she was having a boy or a girl. We learned that not only was she expecting a girl, but rather two girls. Each one has her own placenta, so they will not be identical twins.
I would like you to confirm something for me. Identical twins have the same DNA whereas non-identical twins have different DNA, is that correct?