Chromosome measurements in aged monozygotic twins.
D000368:Aged; D000375:Aging; D000704:Analysis of Variance; D002900:Chromosomes, Human, 1-3; D002901:Chromosomes, Human, 13-15; D002902:Chromosomes, Human, 16-18; D002903:Chromosomes, Human, 19-20; D002904:Chromosomes, Human, 21-22 and Y; D002905:Chromosomes, Human, 4-5; D002906:Chromosomes, Human, 6-12 and X; D005260:Female; D006801:Humans; D007621:Karyotyping; D007962:Leukocytes / Q000166:cytology; D008297:Male; D011247:Pregnancy; D012730:Sex Chromosomes; D014427:Twins