Physical health because your eating habit or where your living could greatly influence how your physical well being is.
stress can lead to headaches, passing out, or even people lashing out.
It really depends, think of it as 2 light bulbs in each parent. if both light bulbs in both parents are switched on that means their genes that they inherited are only able to have brown eyed babies, although if just 1 of the 4 light bulbs are not on it allows the baby to have blue eyes.
