这个词是什么意思？
A blood group consisting mainly of the antigens Fy(a) and Fy(b), determined by allelic genes, the frequency of which varies profoundly in different human groups; amorphic genes are common.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D004375 · MeSH 2026。
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