Tracing Your Family Tree Back 45,000 Years
from the fun-for-the-whole-family dept
Plenty of genealogists have been able to trace their family trees back a few centuries, but at some point in history that trail runs dry. However, one researcher is working on ways to track historical information about your ancestors via your DNA, and is running a big project to gather a ton of information. He's actually worried that this project needs to be completed relatively soon. Now that the world has become a great big mixing pot, many of the historical DNA information is getting blended together, making it more difficult to trace the histories of any particular individual. Of course, it's only fair, as the historical record does seem to show we all pretty much started from the same point anyway.
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Flawed Assumptions
Since Ms. Ovum receives chromosomes piecemeal, each chromosome has a 50% chance of being transmitted. In theory, it is possible to be completely unrelated to your biological sibling, if your sibling received chromosomes 1,2,3... while you received 1',2',3'... (The probability of its occurrence, ignoring recombination, is about 2^-46.)
For the same reason, it is theoretically possible for you to be completely unrelated genetically to one of your grandparents, even if they are your biological grandparent.
Older mothers are more likely to give birth to twins than younger mothers.
Europeans, Asians, and Native Amreicans are all descended from the same Central Asian ancestors. Paradoxically, as more race mixing occurs, the offspring look more like their ancestors.
There are parts of the world where first-cousin marriages are 50-90% of all marriages. Saudi Arabia is said to suffer serious problems from inbreeding, where every family is said to hide a tard or two. The majority of the population, including Osama, has diabetes. Women in that culture stay home all day, or go on outings to the mall where they eat buckets of Haagen Dazs ice cream. Fitness is a funny Western infidel concept to them.
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Re: Flawed Assumptions
It's the same reason why all calico cats are females.
If you go to grad school for genetics, you'll get to learn all the politically incorrect facts they didn't teach you in high school sex ed.
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Re: Flawed Assumptions
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Re: Flawed Assumptions
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Re: Flawed Assumptions
Is that what you told your sister?
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tracing one's ancestry back to before Adam
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Re: tracing one's ancestry back to before Adam
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Re: tracing one's ancestry back to before Adam
From what I can see, some of us have more garbage than others...let us know if by posting it reduces your portion
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hi
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