IllmaticDelta
Veteran
You have understand the USAmerican concept of race. There are/were indeed "white looking Afromericans".
"Black" in the USA means
"Black or African American. A person having origins in any of the Black racial groups of Africa. It includes people who indicate their race as 'Black, African Am.' or provide written entries such as Kenyan, Nigerian, or Haitian."[16]
and to add to that
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And so, why do few if any White Americans display a strongly African appearance (have a high melanin index) despite having detectable African admixture? Because those Americans who “look Black” are assigned involuntarily to the Black endogamous group, whatever their genetic admixture. The scatter diagrams of the two endogamous U.S. groups are not symmetrical because the selection process acts only upon the White group. As revealed in court records, discussed elsewhere, a person of mixed ancestry who “looks European” (like Dr. Shriver or his maternal grandfather) in practice has the option of either adopting a White self-identity, thus joining the White endogamous group or a Black self-identity, thus joining the other group. But a person of mixed ancestry who “looks African” lacks such a choice. U.S. society assigns such a person to membership in the Black endogamous group, like it or not.25
In conclusion, U.S. society has unwittingly applied selection pressure to the color line. The only American families accepted into the White endogamous group have been those whose African admixture just happened not to include the half-dozen alleles for dark skin (or the other physical traits associated with “race”). Since those particular alleles were sifted out of the portion of the White population that originated in biracial families, the relative percentage of the remaining, invisible, African alleles in this population cannot affect skin color. That skin-color does not vary with African genetic admixture among American Whites, despite their measureably recent African admixture, demonstrates and confirms that physical appearance has been an important endogamous group membership criterion throughout U.S. history. It has resulted in genetic selection of the White U.S. population for a European “racial” appearance, regardless of their underlying continent-of-ancestry admixture ratio."
It's explained why in the article
"It seems that Dr. Shriver’s maternal grandfather moved from Pennsylvania to Iowa, then to California, leaving behind in the process most of his ties with his relatives.23 Dr. Shriver, it turns out, (see photograph above) is one of the 74 million White Americans with significant recent African genetic admixture.In a coincidentally similar fashion, Dr. Rick Kittles, Shriver’s collaborator from Howard University in Washington, discovered that he carries the FY-null genetic marker at genome position 1q23.2. This marker is found in 998 out of every thousand Europeans but found in only one out of thousand Africans. Many of Dr. Kittles’s other ancestry-informative markers tell the same unexpected story. Dr. Kittles (see photograph above) is one of the many Black Americans with strong European genetic admixture. And yet, and there is no other way to say this, Dr. Shriver “looks White” and Dr. Kittles definitely “looks Black.” Why is there such a discrepancy between measured genetic admixture and physical appearance?There is an immediate answer to this question, and a deeper answer. The immediate answer is that many different invisible genes identify continent of ancestry. As of the summer of 2004, the private DNA lab DNAPrint Genomics, Inc. uses up to 175 single nucleotide polymorphisms (markers) in order to analyze a client’s ancestral continents of origin.24 On the other hand only a handful of genes encode for the few superficial, externally visible features (skin color, hair curliness, etc.) that Americans see as “racially” significant. Parental genes are randomly recombined with each passing generation. It can happen, through sheer chance, that an individual (like Dr. Shriver) can inherit many invisible African DNA markers, but few or none of the handful of alleles that encode for “racial” appearance. Alternatively, a person (like Dr. Kittles) can inherit those few alleles that encode for visible “racial” appearance but otherwise inherit the invisible but ancestrally informative European admixture markers"
