joyboytoy79
Sexy Member
- Joined
- Aug 28, 2006
- Posts
- 3,686
- Media
- 32
- Likes
- 62
- Points
- 193
- Location
- Washington, D.C. (United States)
- Sexuality
- 100% Gay, 0% Straight
- Gender
- Male
I wouldn't bank on it though, Stronzo. The prevalence of the D 32 gene in Europeans is 1:7 tops. But to have the resistance to HIV you'd need to be homozygous, i.e. a matching pair, one from each parent. So both parents would need to be heterozygous, i.e. carry one, with the other gene being the normal, non-D 32 gene varient (allele).
Doing math: the chance of both parents carrying one allele is 1 in 7x7 = 1:49. That would only give you a 1:4 chance of ending up as homozygous. So if you don't know the D 32 status of your parents, the chance of you being homozygous is 4 x 49 = 196. Let's call it 0.5%. Pretty long odds.
blah...blah...blah...
Your math = Flawed.
Blue eyes are a homozygous trait. Both of my parents had blue eyes. I have blue eyes. They were homozygous little b blue, and so am I.
What I'm getting at is this. If both parents are heterozygous Δ32, then a simple punnet square (do you remember doing those?) tells you that half of the children would be heterozygous Δ32, 1/4 would be homozygous normal, and 1/4 would be homozygous Δ32. However, you needn't have this situation to have homozygous offspring. Much better odds (100%) of having homozygous offspring occur if both parents are homozygous. Where on earth did you get the idea that to have homozygous children each parent must be heterozygous? Anyway, you are right that each parent must be AT LEAST heterozygous Δ32, because of one of them is homozygous, the best the offspring could be is heterozygous Δ32, but the math you stated is assuming, actually, that both parents are homozygous. Even then, it's wrong.
In reality, since 5% to 14% of Europeans (and those with predominately European heritage) carry the gene, without any real data as to how many are heterozygous vs. homozygous, it can best be assumed that roughly 75% of the carriers are heterozygous, and only 25% are homozygous(really, this number would be FAR lower). So, MAX, 3.5% of the European population at large is homozygous. Best case scenario (absurdly unlikely), the chance of having two homozygous parents is roughly 0.1225%. The chance of being at least heterozygous is still 5% to 14%, since that's the prevalence in the general population.
Anyway, the Pope and the Church in general, are still INSANE for spreading anti-condom propaganda. Preach abstinence, sure. Abstinence IS the only way to be 100% sure you're not going to contract an STD through sexual means. Just don't preach AGAINST condom use in the event that your flock should *gasp* ignore your admonishments of carnal joys.
Last edited: