Interactions between more than two gene pairs
- EE, black; ee, yellow; epep, tortoise shell (yellow and black).
- AA, agouti (wild type, black and yellow banded hairs); aa, no agouti, only black.
- BB, black; bb, brown.
- CC, no colour dilution; Ck, Cd, Cr, Ca, various degrees of colour dilution; CkCk, yellow; CaCa, albino.
- PP, no dilute; pp, dilution of black or brown, but not yellow.
- SS, no spotting; ss, spotting; Ss occasional spots.
- SiSi, unsilvered; sisi, silvered effect.
The above different genes act at different stages of pigment development and interact in a complex manner. For a more detailed study, the reader is advised to consult the article by Sewall Wright (1963) on 'Gene Interaction' in the book "Methodology in Mammalian Genetics".