all the families that give birth babis have with dark skin but they are not. they always go to have the babies at the hospital and I think that nurses change the babies that is a joke, but the color of babies is true and strange. i really dnt know how to solve it

Are you sure they're babies being born in game or are you just seeing these families in manage worlds? I have a problem where families generated by the game look like they are completely unrelated (Ex. Spanish mother, Black daughter, Chinese son). If these are actually families that are being played, and/or the babies are being born naturally in game then I don't know what's causing the issue. I know the new superior genetics they boasted at launch seem a bit messed up and definitely don't live up to what they claimed.

all the cases have happened in families that i have created and i am currently playing. so i think the problem comes with the game cz it happened after the last actualization. but thnks anyway

Babies are objects, they do not have genetics. For all I can tell it’s random which model is used.

I knew babies didn't have genetics per-se but I thought they would at least carry a skin tone value considering there's only about 4 choices for infant models. I'm almost ashamed on behalf of EA

... Actually thinking about it. I think the 4 skin tone models for babies might be the problem here. There are more skin tone options for adults, so when they have a baby it just has to select the closest one, and sometimes "the closest one" in the games eyes is still a ways off to ours.