Genetic Studies On A Cavy Species Cross

A Book By J.A.Detlefsen. (Associate Professor Of Genetics At The University Of Illinois)

Published In 1914, It Gives The Research Of A Genetic Experiment Performed Starting In 1903 By W.E.Castle Who Passed The Research Onto His Assistant J.A.Detlefsen In 1909.

W.E.Castle Took 2 Wild Cavies, A Male And A Female, Acquired From Brazil, To Cross Breed With “Ordinary” Guinea Pigs. I’m Not Sure What An Ordinary Guinea Pig Looked Like Then, But Here Are Some Drawings Of The Cavy cross Subjects.

A Male Wild Cavy

A Half Wild Hybrid Cavy

A ¾ wild Hybrid Female