Hair is genetic.

Gram, Granddad, and MacDuff came for a visit(my parents and their dog).  Anna was thrilled because she loves MacDuff, Granddad and Gram aren't to shabby either.  They brought with them some hand-me down toys from my sister.  Anna thought it was christmas all over again.  She got a Carebear chair and couch and a FisherPrice farm and circus.  She has only stopped playing with them long enough to eat and sleep.  

When my dad woke up this morning it was VERY apparent where Anna got her hair from.

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I guess hair styles are genetic.