"Blood" vs. genetics in the HP books (Was: Magic genetics)

[finwitch]

No: HPFGUIDX 146532

Carol:
> At any rate, setting aside JKR's rather muddled idea of genetics, we
> never hear the terms "gene" or "genetics" spoken by any wizard, not
> even Dumbledore. It's always "blood."

Finwitch:

How about combining both? I mean like the heritance of blood-type. The
blood-type has *two* dominant allels: A and B; one recessive, 0. In
addition there's the Rhesus-factor (and some others, but...).

A-type occurs as AA and A0 (which is what *dominant* gene means!) and
evenly, B-type occurs as BB and B0.

Being recessive, type 0 only occurs as 00.

There's also type AB - meaning one parent has A and the other has B.

Rhesus-factor is dominant.

As for how this applies to magic - well, maybe if the types A and B
have magical form, it would explain the occasional squib (0-type). And
I suppose that exhange between Magical A and Muggle A is a small one.

Also, if a mutation happens in reprocuctive cells, it would affect
offspring, but not the parent - if elsewhere, it affects the parent if
it happens in a cell where the gene functions...

Finwitch