system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Do some people really have "strong" or "weak" genes?

My new baby is 95% me in looks and disposition.  My fiancee's sisters have 5 kids between them, and they mostly look like their fathers.  Does her family simply have "weak genes" or is it just coincidence?
gpt
"Strong" and "Weak" are poor terms for this.

"Dominant" and "Recessive" are more accurate.  Remember 8th grade biology with those Punnett Squares?  Some traits are "dominant" which means that they tend to show up if someone has them.  Other's are recessive which means they tend not to show up as much since you need to have the trait from both parents for it to show.

Now Punnett Squares are overly simple when talking about genes but that is ultimately what you are asking.  So yes, some genes are "strong" but it is incorrect to say that they are somehow "better" than other "weak" genes.  Some genes just tend to show up if present while others do not.