Toc: Content: Edited byPage iiiCopyright pagePage ivContributors To Volume VIPage vMap Construction in Neurospora Crassa Original Research ArticlePages 1-93Raymond W. Barratt, Dorothy Newmeyer, David D. Perkins, Laura GarnjobstGenetic Changes in Human Populations, Especially Those Due to Gene Flow and Genetic Drift Original Research ArticlePages 95-139Bentley GlassMonozygotic Twins in Cattle Original Research ArticlePages 141-181John HancockThe Genetics of the Newer Human Blood Factors Original Research ArticlePages 183-234Philip LevineComparative Incompatibility in Angiosperms and Fungi Original Research ArticlePages 235-285D. LewisCytoplasmic Inheritance in Epilobium and Its Theoretical Significance Original Research ArticlePages 287-401P. MichaelisThe Genetics of Colias (Lepidoptera) Original Research ArticlePages 403-450Charles L. RemingtonArtificial Insemination and Livestock Improvement Original Research ArticlePages 451-472Alan RobertsonAuthor IndexPages 473-480Subject IndexPages 481-485