1. Comparative behaviour of ring chromosomes;Kistenmacher, M.L.; Punnett, H.H.;American Journal of Huiman Genetics,1970
2. The production of homozygous deficient tissues with mutant characteristics by means of the aberrant mitotic behaviour of ring-shaped chromosomes;McClintock, B.;Genetics,1938
3. Points of exchange in a human No. 5. ring chromosome;Nakagome, Y.; linuma, K.; Taniguchi, K.;Cytogenetics and Cell Genetics,1973
4. A child with a ring-4 chromosome (46, XX/46, XX,+4);American Journal of Diseases of Clhildren,1974
5. The female fetus was fresh and weighed 371 g, crown-rump length 17 cm. This is small for 24 weeks (630 g and 20-7 cm, Streeter, 1921). The face (Fig.) was strikingly odd. There was ocular hypertelorism and the eyes were open and bulging. There was micrognathia, lowset ears, a high arched palate, cleft Prenatal recognition of 4psyndrome