An Interchange in Maize Giving Low Sterility and Chain Configurations.

be influenced by several genetic factors.6 'The higher rate in the males might be accounted for by the assumption that the male sex stimulates the instability. Experiments are now in progress which are expected to throw more light on this problem. Summary.-Miniature-3 gamma gene is unstable in somatic cells. The results of experiments in which the flies carrying this gene were reared at 30 = 0.2, 25 = 1 and 20 =L 0.2 degrees centigrade, respectively, are interpreted to indicate that these temperature differences have not produced any effect on the instability of the gene. It has been found that the frequency of gene changes was alike in males and in females in spite of the fact that a female carries approximately twice the number of miniature genes carried by a male.