wizard geneology - Genius or Baloney?

[richter_kuymal]

No: HPFGUIDX 148142

In RL I actually do some practical application of genetics and AFAIK, 
the statement that the wizard gene is a dominant has to be a FLINT.  
In all the genetic scenarios I can come up with, even 
using "modifying" genes to activate the dominant "wizard" gene, you 
just end up with far too many squibs or too many wizards compared to 
Muggles.  The only way it really works is if the wizard gene is 
actually a RECESSIVE (or even better, if it is two recessive genes).  
In this case Muggles would very rarely have the "right" pair of 
parents producing wizard offspring.  Such parents would have a higher 
percentage of producing multiple wizard children but it wouldn't be a 
guarantee.  Hence the Creavey brothers and Petunia/Lily.  A squib 
would occur only if the recessive gene of the wizard parents 
somehow "reverted" to the more "normal" Muggle mode.  And 
genes "reverting" does occur (at least in dogs, where a genetic 
verification of parentage proved it)-- but it is VERY RARE.  

I think genetics probably is in the same league as math with JKR.
PAR