Inheritance of Characteristics in Domestic FowlDavenport, Charles Benedict
Science
Inheritance of Characteristics in Domestic Fowl
Davenport, Charles Benedict
Heredity; Poultry
| 903 | 9824 | 8463 | 6 | 5 |
| | | +---------+---------+
| | | | 18 | 21 |
+----------+-----------+-----------+---------+---------+
| Mother left lop, father right. |
+----------+-----------+-----------+---------+---------+
| | | | | |
| 831 | 1980 | 4213 | 9 | 17 |
| 904 | 3901 | 7840 | 4 | 3 |
| 904 | 7645 | 7840 | 6 | 3 |
| | | +---------+---------+
| | | | 19 | 23 |
+----------+-----------+-----------+---------+---------+
| Mother right lop, father left. |
+----------+-----------+-----------+---------+---------+
| 903 | 3946 | 8463 | 2 | 0 |
| 903 | 4079 | 8463 | 7 | 2 |
| 903 | 4082 | 8463 | 11 | 6 |
| | | +---------+---------+
| | | | 20 | 8 |
+------------------------------------------------------+
| Summary. |
+-----------------------------+------------------------+
| | Offspring. |
| Parents. +------+--------+--------+
| |Total.| Right. | Left. |
+-----------------------------+------+--------+--------+
| | |_P. ct._|_P. ct._|
|Both with right lop | 176 | 38 | 62 |
|Both with left lop | 39 | 46 | 54 |
|Mother left lop, father right| 42 | 45 | 55 |
|Mother right lop, father left| 28 | 71 | 29 |
+-----------------------------+------+--------+--------+
From table 56 it appears, summing all cases, that there are more
left-lopping offspring than right-lopping as 161 to 124 or as 56.5
per cent to 43.5 per cent and that this excess holds whether both
parents are right-lopping, or both left-lopping, or the mother
left and the father right. Only in the case when the mother is
right-lopping is there a majority of offspring of the same sort,
but here the numbers are too inconsiderable to carry much weight.
Although there is not clear evidence of any sort of inheritance,
it is probable that the position of the lop is not determined by a
single factor, but by a complex of factors.
Public-domain text, read in full here on John Shaqi.
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