Speed Racer: More Numbers

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I ran some more of Saletan's numbers, and they are definitely non-Mendelian. He gives the following for the X allele frequencies in the various populations: Asians - 52%, European Whites - 42%, African Americans - 27%, West Africans - 16%. From this we can calculate the probable distribution of the XX, XR, and RR expected from random matings and births. For Asians, XX should occur with frequency (.52^2)=27%, RX (.52)(.48)*2= 25%, and RR at (.48)^2 = 23% These numbers differ very slightly from the ones of my table:

Race ******* RR *** RX *** XX

Asian _____.25__ .50___ .25

Wh Euro ___.30 __.50__ .20

Af Am_____ .60 __.27__ .13

Af Bantu ___.81__ .18___ .01

But the differences are larger for the other groups. Here is the expected table.

Race ******* RR *** RX *** XX

Asian _____.27__ .50___ .23

Wh Euro ___. 33__.49___ .18

Af Am_____ .53 __.40___ .07

Af Bantu ___.71___ .26___ .03

Compared to random behavior, RR is underrepresented among Asians and European whites, but the opposite trend is even more pronounced among those of African descent. Very odd.

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