Abstract
It has been shown by several investigators that after the total ablation of the left ovary in the fowl the right gonad which is normally a minute rudiment, hypertrophies and forms an organ usually of testis-like structure. Why the right rudimental gonad, after removal of the left normal ovary, should develop to an organ of testis-like structure? The explanation given by Domm ('27, '30) is that the right gonad of the female chick is composed mainly of the medullary tissue of the embryonal gonad, which has the capacity of developing to the testicular tissue.
In the present study the same experiment as in the previous study in cross of different strains of the fowl was carried out, in order to verify the previous results which offered an important suggestion as to the determination of the sex in the fowl. As materials pure Barred Plymouth Rocks and crosses of Brown Leghorns and Barred Plymouth Rocks were used. As in a previous experiment ('40) the operation was performed successfully in very young chicks (10-25 days old).
