title: The relation of parental sex and age to recombination in the HL-A system.
mesh_terms: D000328:Adult; D000367:Age Factors; D005260:Female; D005787:Gene Frequency; D006649:Histocompatibility Antigens; D006801:Humans; D008297:Male; D008423:Maternal Age; D008875:Middle Aged; D010375:Pedigree; D011247:Pregnancy; D011995:Recombination, Genetic; D012737:Sex Factors
chemical_list: D006649:Histocompatibility Antigens