21. Memorandum to Marcus Rhoades (about the Ds Locus) Publication: Produced: January 1949 Subject(s): ChromosomesChromosome BreakageMutation Archival Collection: The Barbara McClintock Papers (Profiles in Science)
22. The Association of Mutants with Homozygous Deficiencies in Zea Mays Publication: Genetics Society of America, September 1940 Subject(s): Ring ChromosomesZea maysMutationPhenotypeGenetic MarkersMitosis Archival Collection: The Barbara McClintock Papers (Profiles in Science)
23. Memorandum to Marcus Rhoades (about the Ds Locus) [pages 1-25] Publication: Produced: January 1949 Subject(s): MutationChromosome BreakageGene ExpressionGenetics Archival Collection: The Barbara McClintock Papers (Profiles in Science)
24. Memorandum to Marcus Rhoades (about the Ds Locus) [pages 26-54] Publication: Produced: January 1949 Subject(s): MutationRing ChromosomesGene ExpressionGenetics Archival Collection: The Barbara McClintock Papers (Profiles in Science)
25. Memorandum to Marcus Rhoades (about the Ds Locus) [Appendix] Publication: Produced: January 1949 Subject(s): GeneticsZea maysMutation Archival Collection: The Barbara McClintock Papers (Profiles in Science)
26. Mode of Operation of a System of Controlling Elements in Maize Publication: Produced: [Winter 1956-1957] Subject(s): Suppression, GeneticMutationZea maysChromosomes Archival Collection: The Barbara McClintock Papers (Profiles in Science)
27. Mode of Operation of a System of Controlling Elements in Maize (pages 1-31) Publication: Produced: [Winter 1956-1957] Subject(s): Zea maysMutationGene Expression RegulationGenes, Suppressor Archival Collection: The Barbara McClintock Papers (Profiles in Science)
28. The Production of Homozygous Deficient Tissues with Mutant Characteristics by Means of the Aberrant Mitotic Behavior of Ring-Shaped Chromosomes Publication: Genetics Society of America, July 1938 Subject(s): Ring ChromosomesMutationChromosome BreakageMitosis Archival Collection: The Barbara McClintock Papers (Profiles in Science)
29. Mode of Operation of a System of Controlling Elements in Maize (Appendix) Publication: Produced: [Winter 1956-1957] Subject(s): Zea maysMutationGene Expression RegulationGenes, Suppressor Archival Collection: The Barbara McClintock Papers (Profiles in Science)
30. Letter from Joshua Lederberg to Barbara McClintock Publication: Produced: 4 October 1948 Subject(s): Recombination, GeneticMutationGenetics, Microbial Archival Collection: The Barbara McClintock Papers (Profiles in Science)