SUMMARY OF THE PREVIOUSLY DETERMINED CROSS-OVER VALUES.
The data of the earlier papers, namely, Dexter, 1912; Morgan, 1910c, 1911a, 1911f, 1912f, 1912g; Morgan and Bridges, 1913; Morgan and Cattell, 1912 and 1913; Safir, 1913; Sturtevant, 1913 and 1915; and Tice, 1914, have been summarized in a recent paper by Sturtevant (Sturtevant, 1915) and are given here in table 64. Our summary combines three summaries of Sturtevant, viz, that of single crossing-over and two of double crossing-over.
Table 64.—Previously published data summarized from Sturtevant, 1915.
| Factors.
| Total.
| Cross-overs.
| Cross-over
values. |
| Yellow white. | 46,564 | 498 | 1.07 |
| Yellow vermilion. | 10,603 | 3,644 | 33.4 |
| Yellow miniature. | 18,797 | 6,440 | 34.3 |
| Yellow rudimentary. | 2,563 | 1,100 | 42.9 |
| Yellow bar. | 191 | 88 | 46.1 |
| White vermilion. | 15,257 | 4,910 | 32.1 |
| White miniature. | 41,034 | 13,513 | 32.8 |
| White rudimentary. | 5,847 | 2,461 | 42.1 |
| White bar. | 5,151 | 2,267 | 44.0 |
| Vermilion miniature. | 5,329 | 212 | 4.0 |
| Vermilion rudimentary. | 1,554 | 376 | 24.1 |
| Vermilion bar. | 7,514 | 1,895 | 25.2 |
| Miniature rudimentary. | 12,567 | 2,236 | 17.8 |
| Miniature bar. | 3,112 | 636 | 20.4 |
| Rudimentary bar. | 159 | 7 | 4.4 |
SUMMARY OF ALL DATA UPON LINKAGE OF GENS IN CHROMOSOME I.
In table 65 all data so far secured upon the sex-linked characters are summarized. These data include the experiments previously published in the papers given in the bibliography and the experiments given here. The data from experiments involving three or more loci are calculated separately for each value and included in the totals.
Table 65.—A summary of all linkage data upon chromosome I.
| Gens.
| Total.
| Cross-overs.
| Cross-over
values. |
| Yellow lethal 1. | 131 | 1 | 0.8 |
| Yellow lethal 1b. | 744 | 6 | 0.8 |
| Yellow white. | 81,299 | 875 | 1.1 |
| Yellow abnormal. | 15,314 | 299 | 2.0 |
| Yellow bifid. | 3,681 | 201 | 5.5 |
| Yellow club. | 525 | 93 | 17.7 |
| Yellow vermilion. | 13,271 | 4,581 | 34.5 |
| Yellow miniature. | 21,686 | 7,559 | 34.3 |
| Yellow sable. | 1,600 | 686 | 42.9 |
| Yellow rudimentary. | 2,563 | 1,100 | 42.9 |
| Yellow bar. | 626 | 300 | 47.9 |
| Lethal 1 white. | 1,763 | 7 | 0.4 |
| Lethal 1 miniature. | 814 | 323 | 39.7 |
| Lethal 1b white. | 846 | 0 | 0.0 |
| White facet. | 666 | 7 | 1.1 |
| White abnormal. | 16,300 | 277 | 1.7 |
| White bifid. | 23,595 | 1,260 | 5.3 |
| White lethal 2. | 8,011 | 767 | 9.6 |
| White club. | 2,251 | 321 | 14.3 |
| White lethal sb. | 3,678 | 572 | 15.6 |
| White lemon. | 241 | 35 | 14.5 |
| White depressed. | 59 | 12 | 20.3 |
| White lethal sa. | 1,150 | 256 | 22.2 |
| White vermilion. | 27,962 | 8,532 | 30.5 |
| White reduplicated. | 418 | 121 | 28.9 |
| White miniature. | 110,701 | 31,071 | 33.2 |
| White furrowed. | 208 | 63 | 30.3 |
| White sable. | 2,511 | 1,032 | 41.2 |
| White rudimentary. | 6,461 | 2,739 | 42.4 |
| White forked. | 3,664 | 1,676 | 45.7 |
| White bar. | 5,955 | 2,601 | 43.6 |
| White fused. | 430 | 186 | 43.3 |
| White lethal sc. | 3,053 | 1,406 | 46.0 |
| Facet vermilion. | 852 | 278 | 32.6 |
| Facet sable. | 186 | 80 | 43.0 |
| Bifid vermilion. | 2,724 | 849 | 31.1 |
| Bifid miniature. | 219 | 67 | 30.6 |
| Bifid rudimentary. | 899 | 384 | 42.7 |
| Bifid forked. | 306 | 130 | 42.5 |
| Lethal 2 vermilion. | 1,400 | 248 | 17.7 |
| Lethal 2 miniature. | 6,752 | 1,054 | 15.4 |
| Club lethal 3. | 222 | 29 | 13.0 |
| Club vermilion. | 5,558 | 1,047 | 18.8 |
| Lethal sb miniature. | 3,678 | 733 | 19.9 |
| Lemon vermilion. | 241 | 29 | 12.0 |
|
Shifted vermilion. | 1,007 | 155 | 15.5 |
| Shifted bar. | 242 | 76 | 31.4 |
| Depressed vermilion. | 59 | 10 | 17.0 |
| Depressed bar. | 464 | 176 | 38.0 |
| Lethal 3 vermilion. | 1,549 | 105 | 6.8 |
| Lethal 3 miniature. | 1,481 | 138 | 9.3 |
| Vermilion dot. | 57 | 0 | 0.0 |
| Vermilion reduplicated. | 667 | 11 | 1.7 |
| Vermilion miniature. | 10,155 | 317 | 3.1 |
| Vermilion furrowed. | 240 | 9 | 3.8 |
| Vermilion sable. | 9,209 | 929 | 10.1 |
| Vermilion rudimentary. | 1,554 | 376 | 24.1 |
| Vermilion forked. | 665 | 163 | 24.5 |
| Vermilion bar. | 23,522 | 5,612 | 23.9 |
| Vermilion fused. | 9,252 | 2,390 | 25.8 |
| Reduplicated bar. | 583 | 120 | 20.6 |
| Miniature furrowed. | 208 | 7 | 3.4 |
| Miniature sable. | 1,855 | 125 | 6.7 |
| Miniature rudimentary. | 12,786 | 2,284 | 17.9 |
| Miniature bar. | 3,112 | 636 | 20.5 |
| Furrowed sable. | 209 | 12 | 5.7 |
| Furrowed forked. | 209 | 40 | 19.1 |
| Furrowed bar. | 240 | 43 | 17.9 |
| Sable rudimentary. | 663 | 95 | 14.3 |
| Sable forked. | 872 | 140 | 16.0 |
| Sable bar. | 7,524 | 1,036 | 13.8 |
| Sable lethal sc. | 1,641 | 387 | 23.6 |
| Rudimentary forked. | 1,456 | 20 | 1.4 |
| Rudimentary bar. | 664 | 15 | 2.3 |
| Forked bar. | 1,706 | 8 | 0.5 |
| Forked fused. | 1,201 | 37 | 3.1 |
| Bar fused. | 8,768 | 222 | 2.5 |
| Bar lethal sc. | 1,734 | 144 | 8.3 |