Inbreeding can lead to increased uniformity within the inbred stock, increased prepotency in outcrosses, production of abnormal types, and symptoms of decline in vigor.

The inbreeding experiment with Jersey and Holstein cattle mentioned in the above article was initiated by W. M. Regan, Professor of Animal Husbandry in the Experiment Station. Berkeley.

This is the twelfth article in a series of brief progress reports on the application of the science of genetics to commercial agriculture.