On 4/30/07, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
Ok, in saying I was off the mark, you made me re-evaluate what my assumptions where rather than plot them out. A simple Dominant/Recessive trait scheme would result in the following mendel square: Mother: DD Mother: dD Mother: Dd MOther: dd Father: DD Father: Dd Father: dD Father: dd The odds of having the traits required where the child born has both dd is actually 1 in 4, rather than 1 in 2. I used the reciprocal of 2^n where n = number of gene sites required to produce a magery of a given level.
Nonsense. Consider the case where a child born with DD dies at birth, people with dD or Dd have a 90% chance of dieing in childhood, and dd are normal. The population is going to be largely dd, because carries of the D die before they reproduce. Very few genes are present in half the population.
The actual odds of achieving a given trait where both are recessive depends on both parents giving the child the recessive gene. When you increase the number of gene sites to 2, the odds of a child getting recessives at both sites becomes 1 in 16.
Only if the gene is present with a 50% chance; that's not likely. -- David Scheidt [EMAIL PROTECTED] _______________________________________________ GurpsNet-L mailing list <[email protected]> http://mail.sjgames.com/mailman/listinfo/gurpsnet-l
