"MIRROR COVERING IN THE HOUSE OF MOURNING"
The Jewish tradition of covering up mirrors during shiva (the seven-day period of mourning by the deceased's immediate family) is still practiced today. According to several Jewish sources, when the soul departs from this world, a void is created. This void may end up attracting evil spirits to fill it. These demonic ghosts have a penchant for attaching themselves to mirror reflections. To prevent this from happening, Jews cover their mirrors until the end of shiva.
Not all the useful DNA in your chromosomes comes from your ancestors some of it was borrowed from elsewhere.