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Study of an American Negro Family with the Rare Rh Genotype r^yr (CdE/cde)

Somsak Phansomboon^* and Otakar J. Pollak

Abstract

1. The very rare genotype r^yr (CdE/cde) is reported for the first time in a colored American family.

2. The probable frequency of the r^y (CdE) gene among white and colored Americans is considered.

3. The manner of genetic transmission of the r^y (CdE) gene is discussed.

4. A theoretical explanation for racial differences in the frequency of Rh negative persons is offered.

Footnotes

^* Siriraj Hospital Medical School, Bangkok, Thailand (Siam).

Quincy City Hospital, Quincy, Mass.