Gamma 3 gene duplication.
D000483:Alleles; D002648:Child; D002678:Chimera; D005260:Female; D005819:Genetic Markers; D006801:Humans; D007126:Immunoglobulin Allotypes / Q000235:genetics*; D007074:Immunoglobulin G / Q000235:genetics*; D007621:Karyotyping; D008297:Male; D011247:Pregnancy; D014427:Twins
D005819:Genetic Markers; D007126:Immunoglobulin Allotypes; D007074:Immunoglobulin G