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Politics : Evolution -- Ignore unavailable to you. Want to Upgrade?

To: High Grader who wrote (233)	9/14/1999 9:33:00 AM
From: TigerPaw	Read Replies (1) \| Respond to of 69300

who married whom All that needs to be present at one time is a man and a woman. There was obviously a lot of sex going on between people with closer family ties than is generally prevalent today. TP

To: High Grader who wrote (233)	9/14/1999 9:47:00 AM
From: MikeH	Respond to of 69300

If I remember my genetics correctly You only need a differentiation of 2 to be mostly devoid (80%) of intermarriage genetic defects. This is first cousins, and you will avoid MOST problems. But, if first cousins keep interbreeding, it gets bad, because genetic differentiation gets to the point of brother - sister. However, at 2nd cousins, you can interbreed almost indefinately, and still avoid genetic defect. But, you will lose postive recessive traits. That is why humans traditionaly married at the level of 4th or 5th cousins. This was due to historical geographic isolation. Now, we are much more dispersed, my wife and I have to go all the way back to Ireland in the 1830's to find and intermarriage between our ancestors.

To: High Grader who wrote (233)	9/14/1999 12:25:00 PM
From: Jacques Chitte	Read Replies (1) \| Respond to of 69300

If you do the spreadsheet - and fill in names - the further back you go the more you see duplications. After 33 regressive generations you have four plus billion slots in your spreadsheet shared by probably less than one million actual people.