title: Further studies of chimerism in heterosexual cattle twins.
mesh_terms: D000818:Animals; D001854:Bone Marrow Cells; D002417:Cattle; D003582:Cytogenetics; D005260:Female; D008214:Lymphocytes / Q000166:cytology; D008297:Male; D008540:Meiosis; D008938:Mitosis; D009030:Mosaicism; D011247:Pregnancy; D012730:Sex Chromosomes; D012744:Sex Ratio; D013094:Spermatozoa; D013154:Spleen / Q000166:cytology; D014427:Twins