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fetish sponge
!8.L5bN30V.
I just spent 20 minutes typing up an answer to this only to accidentally click in the wrong place and have it all go away, now I'm sad. I'll retype a short version. genes come in sets of 2, 1 from each parent. if you have 1 dominant and 1 recessive you have a 50% chance of giving your... self spawn 1 dominant and 1 recessive gene, and a 25% chance of giving them a double recessive, likewise a 25% chance of giving them a double dominant. http://en.wikipedia.org/wiki/Dominance_relationship most genetic mutations that haven't been bred out yet (unless someone slept with the mutated person) are the result of a combination of at least 2 sets of double recessive genes. if you have one the likelihood of finding someone outside your family with 1 is minuscule, though within your family it is greater. if you have 1 parent with 1 dominant and 1 recessive gene you have a 50% chance of having a single recessive gene. theres a 25% chance that both you and a sibling would have a single recessive gene each. you then have a 25% chance of having a child with a double recessive gene, coming to a grand total of 6.25%. and thats only 1 set, if you have to have 2 sets of double recessive genes it would be 6.25% of 6.25%, or just under 0.4%. at least for sibling incest. and thats all based on the assumption that your parents had 2 specific recessive genes between them. the real danger is when its done for generations at a time the chance increases exponentially. if you're talking about the chances of passing that on to a spawn to which you have contributed all of your genes, well 25% that you pass on 1 double recessive, and another 25% that you pass on the second one, so a total of a 6.25% chance.
now I almost want to start getting into which types of genetics could pass futaism along, but most of you have stopped reading by now anyway.
tl;dr chances of you and a sibling having a mutant 0.4% chances of a futa having a mutant with themselves 6.25%
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