+------+----+---------------------------------+---------------------+-----+-------------------------------------------------+ |Serial| Pen| Mother. | Father. |Total| Grade of openness in offspring. | | No. | No.+-----+----+------------------+---+-----+----+------+---+ gr. |----+----+----+----+----+----+----+----+----+----+ | | | No. |Gen.| Races. |Gr.| No. |Gen.|Races.|Gr.| | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | +------+----+-----+----+------------------+---+-----+----+------+---+-----+----+----+----+----+----+----+----+----+----+----+ | 62 | 803| 529| F1 | Houd. × Min. | 3 | 7522| P. | Houd.| 9 | 12 | 4 | 2 | 4 | 1 | 2 | .. | .. | 2 | 2 | 1 | | 63 | 803| 7065| F1 | Houd. × Dk. Brah.| 1 | 7522| P. | Do. | 9 | 10 | 6 | 11 | 6 | 4 | 2 | 1 | 2 | 6 | 4 | 1 | | | | | | +----+----+----+----+----+----+----+----+----+----+ | | | | | Totals (61) | 10 | 13 | 10 | 5 | 4 | 1 | 2 | 8 | 6 | 2 | | | | | | Percentages |16.4|21.3|16.4| 8.2| 6.5| 1.6| 3.3|13.1| 9.8| 3.3| | | | | | |\--------\/-------/|\-------------\/------------/| | | | | | | 62.3 | 37.7 | +------+----+-----+----+--------------------------------------------------+-------------------+-----------------------------+ TABLE 51.--_Distribution of frequency of grades of "openness" in offspring when one parent is heterozygous and the other an extracted dominant (DR × DD, extracted)._ [ABBREVIATIONS: H = Houdan; L = Leghorn; M = Minorca; P = Polish; WL = White Leghorn.]