Page:Mendel's principles of heredity; a defence.pdf/18

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CONTENTS.

INTRODUCTION.
The Problems of Heredity and their Solution, pp. 1—39.
Preliminary statement of Mendel's principles, 8. Relation of Mendel's discovery to the law of Ancestral Heredity, 19. Heterozygote and Homozygote, 23. New conceptions necessitated by Mendel's discovery, 26. Simple alternative characters, or allelomorphs, 27. Compound allelomorphs and their components, 29. Analytical Variations, 29. Relation of Mendel's principle to continuous variation, 32. Dominance, 32. Non-Mendelian phenomena, 33. False hybrids of Millardet. 34. Brief historical notice, 36.
MENDEL'S EXPERIMENTS IN PLANT HYBRIDISATION, pp. 40—95.
Introductory Remarks, 40. Selection of Experimental Plants, 42. Division and Arrangement of Experiments, 44. Characters selected, 45. Number of first crosses, 47. Possible sources of error, 47. Forms of the Hybrids, 49. Dominant and recessive, 49.
First generation bred from the Hybrids, 51. Numbers of each form in offspring, 52. Second generation bred from the Hybrids, 55. Subsequent generations bred from the Hybrids, 57.
First generation bred from the Hybrids, 51. Numbers of each form in offspring, 52. Second generation bred from the Hybrids, 55. Subsequent generations bred from the Hybrids, 57.
Offspring of Hybrids in which several differentiating characters are associated, 59. The reproductive cells of the Hybrids, 66. Statement of Mendel's essential deductions, 67. Experiments to determine constitution of germ-cells, 68. Statement of purity of germ-cells, 72.
Experiments with Phaseolus, 76. Compound characters, 80. Concluding Remarks, 84.
MENDEL'S EXPERIMENTS WITH HIERACIUM, 96—103.