Is insomnia genetic?

Is insomnia genetic?
Is it an inheritance from my Grandmother?
I wonder as I contemplate
the hours it takes for me to get to sleep.

Grandma had difficulty sleeping!
When she couldn't sleep
she would clean house
or play solitaire
at the kitchen table
with 52 cards.

I don't like cleaning house
in the middle of the night;
I think house cleaning should be done
in broad daylight
with all the curtains open.

When I can't sleep
I write,
pray,
meditate,
read,
stare out the window into the night,
or play solitaire on my computer.

Sleep never comes easy
and sometimes it doesn't come
at all.