1. Cytogenetic studies in the genusAllium

   • S. W. Mensinkai

   OriginalPaper Pages: 1 - 45

2. The effect ofX-rays on sex inDroso phila subobscura and an account of some sex-linked characters

   • A. L. M. Christie

   OriginalPaper Pages: 47 - 60

3. The inheritance and linkage relations of yellow seedling, a lethal gene in Asiatic cotton

   • Chi Pao Yu

   OriginalPaper Pages: 61 - 68

4. The inheritance and linkage relations of curly leaf and virescent bud, two mutants in Asiatic cotton

   • Chi Pao Yu

   OriginalPaper Pages: 69 - 77

5. The nature of tetraploidy inPrimula kewensis

   • Margaret Upcott

   OriginalPaper Pages: 79 - 100

6. The genetical and mechanical properties of the sex chromosomes

   • C. D. Darlington

   OriginalPaper Pages: 101 - 137

7. Studies on the nature of the interactions of the genes differentiating quantitative characters in a cross betweenLycopersicon esculentum andL. pimpinellifolium

   • Leroy Powers

   OriginalPaper Pages: 139 - 170

8. Tables of the recombination fraction estimated from the product ratio

   • W. L. Stevens

   OriginalPaper Pages: 171 - 180