<span>Human weight at the time of birth is influenced by stabilizing selection. Stabilizing selection, also known as negative selection, purifying selection or normalizing selection, is a type of natural selection in which genetic diversity decays according to a particular value of the character. This is the most common mechanism of action of natural selection.</span>
Well, if you want to get scientific about it, when two people have a kid, parts of what make them who they are go to that child, and the kid becomes a part of the parents. Basically, they have similar DNA.
A non scientific description of that would be they all have similar personalities because the mom and dad passed on some of them to the child. The child would be most alike to their parents by the subconscious actions they take, for example: how they take a shower. For kids who have step parents (me being one), if they grew up with that parent, they eventually adopt things the parent find interests in. Basically, the answer is in the subconscious actions they take and their personalities. <span />
