phenotype accuracy question

[questfortruth]

Hi guys, I could really use your help with a question from another thread.

How accurate do you guys think a phenotype is to ones actual racial background. Could someone be a 4th Amerindian and 3/4ths European and it not be visible in there phenotype?

I'm asking this question in regards to a thread in another form. Help from anyone here would be appreciated. www.stormfront.org/forum/showthread.php?t=252483 . According to the autosomal DNA testing being offered by AncestrybyDNA people with clearly visible European phenotypes are receiving scores with up to 25% admixture in there racial make up. Would you say that someone with a 25% admixture would know by there facial features? Also, how accurate could someone with a trained eye see into a persons phenotype, could you even see a 5% non-European admixture? Thanks

[asdf]

High school biology tells you sexual reproduction gives each of us 1 allele per pair from one parent, and the other from the other parent, both selected at random from each of the parents' pairs. Thus, a child could theorically receive absolutely no genes (aside from mitochondrial and a y-chromosome) from one of its grandparents, and in this case, could receive nothing having anything to do with physical appearance. So a child from parents of alien racial stocks (to each other) would almost have to always have influence from both parents, in the same fashion a child from only one grandparent of alien racial stock (to the rest of the grandparents) could receieve only the genes from that grandparent's child that were from that grandparent, and thus be 50% alien, or receive none and be 100% of whatever 3/4 of its ancestry was.

On a related note, that child could receive that grandparent's y-chromosome or if female mitochondrial, and have on a genetic test that he was 50% alien, but have absolutely no genes physically alien and for all practical purposes no other genes be alien.

Or a child could have no alien dna in context of his population, but could have inherited tat-c that would make it seem he had mongoloid admixture instead of what it probably is: ancestrally ancient, insignifigant and irrelevantly small.

Because of complications more even important than these, these tests are more useful, though still not particularly reliable, on groups of people or populations, rather than on single subjects.