As we move toward Mother's Day, science gave us another reminder of how important mothering is -- mothering as the actions of caring for a child no matter what your biological relationship.

Research led by Michael Poulin of the University of Buffalo looked at genes for oxytocin and vasopressin receptors that have been linked to kindness and generosity. They tested subjects to see if they had these genes, and they also asked them about whether they saw the world as threatening or not, and people as good or bad.

Simply having those kindness genes wasn't as important as life experiences that shaped the person's worldview. According to WebMD:

So although DNA may influence behavior, people do not come pre-programmed to be kind or mean or altruistic or selfish, says lead researcher Michael Poulin, PhD, of the University at Buffalo.

"We are not just puppets of our genes," Poulin tells WebMD. "Genes influence niceness in combination with perceptions of social threat, which come from our past and present experiences."