Bovine like-sexed male twins with chromosomal chimerism.
Sex-chromosomal chimerism (XX/XY) was described in a pair of bovine like-sexed male twins. One of the twins showed malformed external genitalia, and the other was phenotypically normal. It is proposed that sex-chromosomal chimerism is associated with a choriovascular anastomosis between like-sexed twins examined and "female fetus" which may be overlooked at parturition.
D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000151:congenital*; D002678:Chimera; D005260:Female; D005837:Genitalia, Male / Q000002:abnormalities / Q000473:pathology; D007621:Karyotyping; D008297:Male; D011247:Pregnancy; D012729:Sex Chromosome Aberrations / Q000235:genetics / Q000473:pathology / Q000662:veterinary*; D014430:Twins, Monozygotic