If you ignore "good" and "bad" then it's just "traits can be passed through this mechanism" egg seems a lot more reasonable.
But that's not what it says. RNA fragments are entering the ovum and having some sort of effect .... that's quite different from passing traits the way genes on chromosomes do.
But shouldn’t there have been an evolutionary advantage for such a thing to develop?
s/egg/which/
But that's not what it says. RNA fragments are entering the ovum and having some sort of effect .... that's quite different from passing traits the way genes on chromosomes do.