Understanding How Children Develop Empathy - NYTimes.com
Jared Sperli stashed this in life
“There is some degree of heritability,” said Carolyn Zahn-Waxler, a senior research scientist at the University of Wisconsin-Madison, who has done some of these twin studies. But she notes that the effect is small: “There is no gene for empathy, there is no gene for altruism. What’s heritable may be some personality characteristics.”
Basically, if you're a jerk, your children will be jerks, too.
If you're kind to people, your children will learn to be kind to people.