Copyright information:  information content copyright owned by Cat World expires 70 years from March 1973 at which time the information minus the research notes may be placed in the public domain.
Research Note:  Here is an article which has been partially converted for online presentation.  It is from the March/April 1974  issue of Cat World which holds the copyright for the text.  This text has not been split into separate files so that it makes for easier printing.  Question:  Is it better to allow for printing or optimize for reading and information chunking.  Note the graphics additions to visually break the text.  Note the bolding of terms and the links to other information -- which add a new original dimension to the work and enhance the information offering.

Quantitive Inheritance

Mendelian genetics are sufficient to explain the clear cut differentiation but more difficult to reconcile with the quantitive differences between cats in which a number of graduations occur between two extremities, e.g. height, weight, intelligence, fertility, etc. Nevertheless it has been shown that the inheritance of quantitive characters can be accounted for in Mendelian terms because of the continuous variation of these characters due to the joint action of many genes; each making a small contribution to the total effect. Various methods have been involved for the study of such quantitive characters and some of these will be outlined later.