Exogamy yield stronger Offsprings?

Do Exogamic relationships yield stronger offspring? The reason being, the two parents being more gentically separate then if they were of the same ethnicity. For example, a Portuguese mates with a Amazonian; the offsping would be superior to a full blood Amazonian and a Full blood Portuguese becasue it would have genes from two very distinct groups. Modern Brazilians are the descendents of these 2 groups, and West Africans. Would they be the most superior people in the world?

On the opposite spectrum, high degree to endogamy has terrible effects on offspring health. The Amish for example have numerous abnormalities. Most of them are descendents of the same 500 or so first immigrants.

In theory yes. In the animal kingdom, the females often mate with the alpha male first since he's the strongest and dominant leader it benefits them as a whole. The same thing exists in the past with humans, since then physical strength ain't the only factor as looks, money, and intelligence often comes into it. A kid is more likely to be smarter if both parents are smart.

However, it could also backfire.

Imagine this situation:

Parent A is immune to Disease 1 but is extremely weak against Disease 2.
Parent B is immune to Disease 2 but is extremely weak against Disease 1.

Four outcomes are possible:

The offspring could inherit both immunities and thus be genetically superior.
The offspring could inherit either one immunity and one susceptibility to a disease at which point, no benefit and no loss.
The offspring could inherit neither immunity and end up screwed for life.

There is a less chance of the child inheriting no immunity though, than inheriting either immunity. 3/4 chance of inheriting an immunity but 1/4 chance of inheriting both.

Humans have been doing this with pets for years because it's selective breeding. In terms of the race horse community, breeding a horse with a huge amount of stamina, with a horse that is really fast can create a horse with both or a horse that makes no difference. It's trying to control natural selection, by eradicating weaker traits and spreading beneficial traits.

On the other hand, having a very selective gene pool often results in genetic abnormalities occuring. Generations of brother-sister mating for example increases the risk of the offspring having a genetic abnormality with each generation. This is the reason that incest is illegal in pretty much most societies.

quote harbin

Humans have been doing this with pets for years because it's selective breeding. In terms of the race horse community, breeding a horse with a huge amount of stamina, with a horse that is really fast can create a horse with both or a horse that makes no difference. It's trying to control natural selection, by eradicating weaker traits and spreading beneficial traits.

Having been raised on a horse farm I can tell you that I've rarely seen a colt that's come from two different strong breeding lines come out as anything except for impressive (although, admittedly you get the odd average standardbred but always race quality) and I've seen hundreds. You have the odd one out but usually it's because the mare was old or there was a problem with the pregnancy or the owner just flat out lied (or was misinformed) about how good his horse was. Almost never because of a bad genetic lineup when done correctly. For one example I can use my horses sire, Armbro Agile (owned by a family down the road from us... an obnoxiously rich family). Armrbro was Irish national champ and is one of the few horses I know of to win the Canadian Triple Crown. GD horse sired damn near 150 foals and as far as I know nearly every single one made money. My horse (Will B Agile) practically paid for our farm and I know of numerous other wildly successful horses of the Agile line and that's just the one example of a successful breeding line. So I think generally the mix will result in strength far, far more often than weakness at least in my experience with horses.

quote

This is the reason that incest is illegal in pretty much most societies.

The fact that it's gross is reason enough for me haha.

Well it could be beneficial to the offspring... but in no more amazing a way than the color of the offspring's eyes. Really it depends more on the individual parents than the origin of the parent, and there are a number of ways it could go right, maybe a little more successful than endogamy, but there are also numerous ways it could go wrong. Not just in ways that affect the specific offspring, but also in ways that could affect the gene pools long-term, like certain ethnicity-specific traits. Like anything really. You're right in theory but also a little late to introduce this idea.

Also, Master Tenku, we're in *bleep*ing February, get with the times and fix that signature.

Well I learned a new word today

quote Short Circuit

You know, brother-sister incest really doesn't seem that bad to me. You're obviously not going to get your sister pregnant, so there's no harm done.

quote Short Circuit

Demonfurby

Like I said, I don't have a sister.

No, I meant I can't tell whether you really think incest can't result in pregnancy. When it does happen, it certainly isn't harmless