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The genetic and the operative evidence relating to secondary sexual charactersMorgan, Thomas Hunt

Science

The genetic and the operative evidence relating to secondary sexual characters

Name: The genetic and the operative evidence relating to secondary sexual characters
Author: Morgan, Thomas Hunt

Morgan, Thomas Hunt

Genetics; Poultry; Sex (Biology)

+------------------------------------------+---------------------------------------------+
|                                          |                                             |
|_A_                                       |_C_                                          |
|     GOLD MALE      X    SILVER FEMALE    |                                             |
|                    |  (Product of English|                                             |
|  (Belgian imported |    type males for 7 |                                             |
|   from Brussels.)  |    generations in my|     SILVER MALE       X        GOLD FEMALE  |
|                    |    own yards)       |                       |                     |
|      +-------------+--------------+      |      +----------------+---------------+     |
|      |                            |      |      |                                |     |
|6 Silver Males             6 Gold Females |6 Silver Males              6 Silver Females |
|(Belgian type)                            |(English type)                               |
+------------------------------------------+---------------------------------------------+
|                                          |                                             |
|_B_                                       |_D_                                          |
|                                          |                                             |
|  SILVER CROSS-BRED  X GOLD CROSS-BRED    |   SILVER CROSS-BRED   X   SILVER CROSS-BRED |
|         MALE        |     FEMALE         |        MALE           |        FEMALE       |
|  (offspring of A)   | (offspring of A)   |   (Offspring of C)    |   (Offspring of C)  |
|                     |                    |                       |                     |
|    +--------+-------+-----+---------+    |       +---------------+---------------+     |
|    |        |             |         |    |       |               |               |     |
|4 Silver  2 Gold       2 Silver   5 Gold  | Silver Males    Silver Females  Gold Females|
| Males     Males        Females   Females | (English type)                              |
|(Belgian  (Belgian                        |                                             |
|  type)     type)                         |                                             |
+------------------------------------------+---------------------------------------------+
|                                                                                        |
|_E_                                                                                     |
|                                                                                        |
|       SILVER MALE (offspring of C)          X            GOLD FEMALE (pure)            |
|                                             |                                          |

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The genetic and the operative evidence relating to secondary sexual characters

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