Most things you like/dislike or how you act/are etc comes from nurture not nature, so if you live with & are close to a ‘step’ parent then yes you can get things from them, act like them, be like them.. same applies to adopted parents, same sex parents (not literally as in genetic obviously!)
It’s a big misconception that you ‘inherit’ all these things from your birth family. Because a lot of families are blood related people just assume that they ‘got that from their dad’ etc but children learn mostly by example, so the people who are closest to them are their biggest influencers.
There are some things of course that you do/can get from ‘blood’ such as health conditions, looks (although lots of people look nothing like their birth family & more like a stranger they don’t even know) Some characteristics/personality traits (again there’s an argument for this too) but more often than not most of who you become is who you’re raised by, blood or not.
There is plenty of evidence, studies & families out there to confirm this, mine included. But to be honest a little common sense would tell you this too.
Please try not to get too annoyed by things you don’t even know anything about.
Oh my goodness. Don’t be disappointed, it’s not your child.
When I was little weaning age was 3 months - pretty sure people my age turned out ok. At another point it was 4 months, now 6.. they are ONLY guidelines, and ones that constantly change not just with weaning but what you can eat when you’re pregnant etc (when I was pregnant it was don’t eat nuts, now I’ve been told it’s ok too

)
Common sense is what’s important here, EVERY child is different.
Can we stop judging, belittling & criticising people, especially mothers.