Report of the Committee on the Genetic Constitution of Chromosomes 20, 21, and 22.
D002874:Chromosome Mapping; D002903:Chromosomes, Human, 19-20; D002904:Chromosomes, Human, 21-22 and Y; D008040:Genetic Linkage; D005819:Genetic Markers; D006801:Humans
D005819:Genetic Markers