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Piebald rats and selection : $b An experimental test of the effectiveness of selection and of the theory of gametic purity in Mendelian crossesCastle, William E. (William Ernest)

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

Name: Piebald rats and selection : $b An experimental test of the effectiveness of selection and of the theory of gametic purity in Mendelian crosses
Author: Castle, William E. (William Ernest)

Castle, William E. (William Ernest)

Heredity

+--------+------------------------------------------+--------------------+
 | Grade  |          Grade of offspring.             |Totals.             |
 |  of    +--+--+--+--+--+---+---+---+---+--+--+--+--+      Means.        |
 |parents.|1½|1¾| 2|2¼|2½| 2¾| 3 | 3¼| 3½|3¾| 4|4¼|4½|         Regression.|
 +--------+--+--+--+--+--+---+---+---+---+--+--+--+--+-----+------+-------+
 | 3      |  |  |  |  |  |  1|   |   |   | 1|  |  |  |   2 |      |       |
 | 3⅛     |  | 3| 4| 1| 1|  4|  7|  5|  3|  |  |  |  |  28 | 2.84 |  .28  |
 | 3¼     | 1|  | 3| 3| 8| 26| 31| 31| 24|15| 1|  |  | 143 | 3.10 |  .15  |
 | 3⅜     | 1|  | 5| 6|13| 20| 28| 30| 14| 5|  |  |  | 123 | 2.96 |  .41  |
 | 3½     |  | 1| 9| 4|15| 29| 49| 41| 43|17| 4|  |  | 212 | 3.10 |  .40  |
 | 3⅝     |  |  | 4| 8|11| 24| 34| 36| 37|21| 5|  | 1| 181 | 3.16 |  .46  |
 | 3¾     | 1| 1| 2| 1| 3|  4| 18| 13| 20|13| 2|  |  |  78 | 3.22 |  .53  |
 | 3⅞     |  |  | 4| 1| 3|  5| 14| 15| 20|14| 4|  |  |  80 | 3.26 |  .61  |
 | 4      |  |  | 1|  |  |   |  2|  1|  5| 4| 1|  |  |  14 | 3.41 |  .59  |
 |        +--+--+--+--+--+---+---+---+---+--+--+--+--+-----+------+-------+
 |Totals  |  |  |  |  |  |   |   |   |   |  |  |  |  |     |      |       |
 | or     |  |  |  |  |  |   |   |   |   |  |  |  |  |     |      |       |
 |means,  |  |  |  |  |  |   |   |   |   |  |  |  |  |     |      |       |
 |    3.52| 3| 5|32|24|54|113|183|172|166|90|17|  | 1| 861 | 3.11 |  .41  |
 +--------+--+--+--+--+--+---+---+---+---+--+--+--+--+-----+------+-------+


TABLE 7.—_Classification of generation 7, plus selection series._

 +--------+----------------------------------------------+
 | Grade  |             Grade of offspring.              |
 |  of    +--+--+--+--+--+---+---+---+---+---+--+--+--+--+
 |parents.|1½|1¾| 2|2¼|2½| 2¾| 3 | 3¼| 3½| 3¾| 4|4¼|4½|4¾|
 +--------+--+--+--+--+--+---+---+---+---+---+--+--+--+--+
 |  3⅛    |  |  | 2| 2| 4|  5|  7|  4|  3|  1|  |  |  |  |
 |  3¼    | 1|  | 6|11| 7| 11| 30| 19| 22| 23| 1|  |  |  |
 |  3⅜    | 1| 2|10|18|17| 21| 27| 18| 21| 20| 4| 1|  |  |
 |  3½    |  |  | 6| 9| 9| 21| 31| 28| 35| 34| 3| 1|  |  |
 |  3⅝    |  |  | 7|11|13| 26| 47| 53| 75| 49| 7| 1|  |  |
 |  3¾    |  |  | 2| 3| 3| 16| 28| 25| 58| 42| 4| 3|  |  |
 |  3⅞    |  |  | 2| 1| 2|  4| 10| 12| 23| 21| 6| 6| 2| 1|
 |  4     |  |  |  |  | 1|  1|  3|   |  2|  4| 3|  |  | 1|
 |  4⅛    |  |  |  |  |  |   |   |   |  1|  1| 1|  |  |  |
 |        +--+--+--+--+--+---+---+---+---+---+--+--+--+--+
 |Totals  |  |  |  |  |  |   |   |   |   |   |  |  |  |  |
 | or     |  |  |  |  |  |   |   |   |   |   |  |  |  |  |
 |means,  |  |  |  |  |  |   |   |   |   |   |  |  |  |  |
 |    3.56| 2| 2|35|55|56|105|183|159|240|195|29|12| 2| 2|
 +--------+--+--+--+--+--+---+---+---+---+---+--+--+--+--+

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

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