Somatic Mosaics in the Domestic Pigeon.

OSAIC or chimeric effects not of artificial origin may conveniently M be divided into two classes, those which are frequent, and customarily associated with special genotypes, and those which are rare and unpredictable. Variegation and eversporting are examples of the former class. In the pigeon a condition known as “flecking” is of this sort. The other class includes gynandromorphs and chimeras generally. These phenomena have received little attention in the pigeon. We shall present a review of the known facts, together with new cases which have come under our observation, and suggestions as to the possible causes involved.