This manuscript draft reflected McClintock's increasingly complex understanding of the suppressor-mutator as represented in her Carnegie Institution reports after 1956.. NOTE: Pagination is not sequential; several page numbers are duplicated. In addition, page numbers become erratic after page 206; subsequent pagination is extrapolated.. NOTE: Part Three, pages 122-183, Part Four, pages 184-206. Page number 185 is duplicated.. NOTE: Annotations are written in McClintock's hand.
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