Piebald rats and selection

About this eBook

Author

Phillips, John C. (John Charles), 1876-1938

Title

Piebald rats and selection : An experimental test of the effectiveness of selection and of the theory of gametic purity in Mendelian crosses

Original Publication

Washington, DC: Carnegie Institution of Washington, 1914.

Credits

Brian Wilson, Bryan Ness and the Online Distributed Proofreading Team at www.pgdp.net (This file was produced from images generously made available by The Internet Archive/Canadian Libraries)

Language

English

LoC Class

QH: Science: Natural history

Subject

Heredity

Category

Text

Project Gutenberg

eBook-No. 74375

Release Date

September 5, 2024

Copyright

Public domain in the USA.

Contents

1. 1.Untitled
2. 2.CONTENTS.
3. 3.PIEBALD RATS AND SELECTION. — INTRODUCTION.
4. 4.MATERIAL AND METHODS.
5. 5.PLUS SELECTION SERIES. — Table A.
6. 6.MINUS SELECTION SERIES.
7. 7.RETURN SELECTION.
8. 8.CROSSES WITH WILD RATS.
9. 9.CROSSES WITH BLACK “IRISH” RATS.
10. 10.PLUS SELECTION OF “EXTRACTED HOODED” RATS. — Table B. — Comparison of the present series with the more general plus selection series.
11. 11.CROSSES OF THE PLUS RACE WITH THE MINUS RACE.
12. 12.SUMMARY OF RESULTS.
13. 13.DISCUSSION.
14. 14.THE “MUTANT” SERIES. — Table C.
15. 15.BIBLIOGRAPHY.
16. 16.TABLES. — Table 1. — Classification of the first generation of offspring in the plus selection series. At the head of each column is indicated the grade of the individuals recorded in that column. The figures in the body of the table indicate the numbers of offspring of the several grades indicated. — Table 2. — Classification of offspring in generation 2, plus selection series. — Table 3. — Classification of offspring in generation 3, plus selection series. — Table 4. — Classification of offspring, generation 4, plus selection series. — Table 5. — Classification of generation 5, plus selection series. — Table 6. — Classification of generation 6, plus selection series. — Table 7. — Classification of generation 7, plus selection series. — Table 8. — Classification of generation 8, plus series. — Table 9. — Classification of generation 9, plus series. — Table 10. — Classification of generation 10, plus series. — Table 11. — Classification of generation 11, plus series. — Table 12. — Classification of generation 12, plus series. — Table 13. — Classification of generation 13, plus selection series. — Table 14. — Summary of the results of thirteen generations of plus selection based on Tables 1-13. — Table 15. — Mean grade and number of offspring produced by parents of a particular grade in each generation of the plus selection series, based on Tables 1-13. The grade of the parents is indicated at the head of each column. In the body of the table is recorded the grade of the offspring (in light-faced figures) and the number of offspring (in heavy-faced figures). — Table 16. — Classification of the offspring in generation 1 of the minus selection series. — Table 17. — Classification of generation 2, minus selection series. — Table 18. — Classification of generation 3, minus series. — Table 19. — Classification of generation 4, minus selection series. — Table 20. — Classification of generation 5, minus series. — Table 21. — Classification of generation 6, minus series. — Table 22. — Classification of generation 7, minus series. — Table 23. — Classification of generation 8, minus series. — Table 24. — Classification of generation 9, minus series. — Table 25. — Classification of generation 10, minus series. — Table 26. — Classification of generation 11, minus series. — Table 27. — Classification of generation 12, minus series. — Table 28. — Classification of generation 13, minus series. — Table 29. — Summary of the results of thirteen generations of minus selection, based on Tables 16-28. — Table 30. — Mean grade and number of offspring produced by parents of a particular grade in each generation of the minus selection series, based on Tables 16-28. The grade of the parents is indicated at the head of each column. In the body of the table is recorded the mean grade of the offspring (in light-faced figures) and the number of offspring (in heavy-faced figures). — Table 31. — Results of a first return selection from generation 6, minus series. — Table 32. — Results of a second return selection from generation 6, minus series. — Table 33. — Results of a third return selection from generation 6, minus series. — Table 34. — Results of a fourth return selection from generation 6, minus series. — Table 35. — Results of a fifth return selection from generation 6, minus series. — Table 36. — Results of a sixth return selection from generation 6, minus series. — Table 37. — Results of a return selection from generation 7, minus series. — Table 38. — Results of a return selection from generation 8, minus series. — Table 39. — Results of a return selection from generation 11, minus series. — Table 40. — Results of a return selection from generation 6, plus series. — Table 41. — Results of a return selection from generation 11, plus series. — Table 42. — Classification of the extracted hooded individuals obtained in the second generation from a cross between hooded and wild rats. — Table 43. — Classification of the extracted hooded individuals obtained in the second generation from a cross between hooded and Irish rats. — Table 44. — F₃ generation produced by extracted hooded rats (F₂ generation) derived from a cross of a hooded rat of the minus series with a wild rat. (See Table 42.) — Table 45. — F₄ generation from minus series crossed with wild. — Table 46. — F₅ generation from minus series crossed with wild. — Table 47. — F₆ generation from minus series crossed with wild. — Table 48. — F₇ generation from minus series crossed with wild. — Table 49. — F₈ generation from minus series crossed with wild. — Table 50. — Results of crossing the selected plus with the selected minus series. — Table 51. — F₁ offspring of the original “mutant” male, 4763, +5½, mated with females of the plus series, and with the “mutant” female, 5153, +5¾. — Table 52. — F₁ offspring of the original mutant male, 4763, +5½, mated with females of the minus series. — Table 53. — Classification of the descendants through three generations of the two original mutants, ♂ 4763, +5½, and ♀ 5153, +5¾. The parents are in every case of grade 5½ or 5¾. — Table 54. — F₂ descendants of the original mutant male, 4763, +5½, mated with females of the plus series. (Compare Table 51 .) — Table 55. — F₂ descendants of the original mutant male, 4763, +5½, mated with females of the minus series. (Compare Table 52 .)
17. 17.EXPLANATION OF PLATES. — Plate 1. — Plate 2. — Plate 3.

Community reviews

Sign in to write a review.

No reviews yet.