While this question is about the Rh system, it's a common point of comparison with ABO. The Rh-negative phenotype (lacking the D antigen) is most frequent in people of Basque descent (from the Pyrenees region of Spain and France), where the frequency can be as high as 30-35%. Among Caucasian populations of European descent broadly, the frequency is about 15%. In contrast, the frequency is much lower in African populations (≈5-8%) and very low in Asian and Native American populations (<1%). This geographic distribution has implications for blood banking and obstetric care in different regions. The high frequency in Basques is an interesting genetic anomaly often studied by population geneticists.

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Zambia

• Joseph Soko – 101 pts

• Visual Pathway Lesions
• Positive and Negative Symptoms
• Hallucinations and Delusions
• Antipsychotic Medications
• Emergency: Environmental Emergencies