Eric Bohlman (
Sun, 29 Jan 1995 01:11:54 GMT

William Tyler ( wrote:
: Now try answering the question. I'll repeat it. What do you call the
: property or group of properties that allow you to, more often than
: not, correctly distinguish between a Nigerian and a Swede?

Group variations in phenotype. Please note that the relation of
phenotype to genotype is many-to-many, not one-to-one. It's possible to
have phenotypic clusters that do not correspond to genotypic clusters.
For example, a Nigerian and an Australian aborigine both belong to the
phenotypic cluster that corresponds to the social concept of "black."
Yet the average genotypic distance between a Nigerian and an aborigine is
one of the largest such distances that you can find. The two groups are
about as distantly related in ancestry as is possible.