>> I am suspicious when they say it is an "inherited" disorder!!!
>>
>> they say that about every condition!
>
>In this case it's true.  It's a genetic disorder, not caused by
>diet, and not treated by diet, although I suppose a very low-iron
>diet would help.  A diet rich in red meat would definitely make
>it worse, but the only effective treatment is regular
>bloodletting.

I think there is no clear line between innate and acquired.
I believe genetic is in the process of evolving  everyday also,  it is not
just inherited . Viruses might play an important role in that regard by
bringing new information to the cell. Not all experiences lived by an
organism are genetically transmissible to offsprings ( but certainly
recorded somewhere) and not all genetic traits will be necessary expressed
in form .
Both what is innate and acquired by combining makes the experience of the
individual.
jean-claude