The multitask gene is obviously linked to the X chromosome, because I know of no men who carry the trait.
It occurs not oftener than in about 10 per cent of cases for the total length of the X chromosome.
This term (sex-linked) is intended to mean that such characters are carried by the X chromosome.
The position of this lethal to the X chromosome was found as follows, by means of the cross-over value white lethal sa.
We are justified, therefore, in speaking of the factors carried by the X chromosome as sex-linked.
In the latter case an egg without an X chromosome is produced.
By means of the following experiments the position of fused in the X chromosome was determined.
Triple crossing-over in the X chromosome is extremely rare and has been observed only about a half dozen times.
A preliminary test was made by mating with eosin, whose factor lies near the left end of the X chromosome series.
Diagram I has been constructed upon the basis of all the data summarized in table 65 (p. 84) for the first or X chromosome.