"Zwilling" versus "Tai Chi" configuration of double-sized ring chromosome.
Hoo
Joe J
JJ
Stein
Constance K
CK
D002869:Chromosome Aberrations; D002882:Chromosomes, Human, Pair 13; D002891:Chromosomes, Human, Pair 21; D004314:Down Syndrome / Q000235:genetics; D006801:Humans; D007231:Infant, Newborn; D007621:Karyotyping; D008297:Male