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Ex-USMLE Forums Staff
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Discussion Starter · #1 ·
Two genotypes of the two alfa chain deletions
cis configuration --/aa Common in Asians
trans configuration -a/-a Common in African Americans

To remember these remember that:

  • cis configuration implies a horizontal orientation just like the wide horizontal Asia continent
  • trans configuration implies vertical orientation just like the tall and narrow African continent

:)
 
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