About D.n.a

I was just wondering since I havent been with the baby's original father and that since I have a new boyfriend almost through out my whole pregnancy if : since I have been only intimate with him if his d.N.A will be apart of the baby since my cervics haddent been closed I looked at the ultrasounds the other day and the baby kinda resembles the new boyfriend I have been with for a while.I ask beacuse I know a friend who had gotten pregnant before she met her boyfriend too and the baby came out looking kinda like him too thats why I ask.Please give me an honest answer ty for helping me for thosewho do and are expirienced in what I am expiriencing.