Your mother and father can harness intelligence even if it doesn't show because it may not have been nurtured, but it is shareable to their offspring as other things like a genetic tendency for high hand-eye-coordination like

Laila Amaria Ali has who is an American former professional boxer who competed from 1999 to 2007. She is the daughter of world famous boxer Muhammad Ali.

Or have heightened perception for rhythm and pitch like Natalie Cole had who was an American singer, voice actress, songwriter, and actress. Cole is the daughter of the acclaimed and pioneering American singer and jazz pianist Nat King Cole. These have all been proven. If the DNA is to be a natural musician or athlete, or mathematician and the action is never taught or harnessed, these genetic abilities are virtually useless. These likenesses are not exclusive to daddy. You receive 50% of your genes from each of your parents, but the percentages of DNA you received from ancestors at the grandparent level and further back are not necessarily neatly divided in two with each generation.

Although "you are just like your daddy" is supposed to be an insult by momma and she wants to show zero tolerance for the actions and only claims the good ones, she is not far from the Contribution either way. A child doesn't have to be near a birth parent(s) to pick up their characteristics and habits down to slurring a word because it is packaged in the DNA.

Even to conceive God and the universe can be in a child's DNA if the parent(s) are theologians or astronomers and nurtures it.

When you have children there is a likelihood that they will have a combination of each parent's characteristics, manners, drive, intelligence and talents. It is up to you the parent to know what can be nurtured. If daddy was a deadbeat the child can carry that syndrome so it is up to you with nurture to control or redirect nature.