Gene Interaction (lists)

1. Inter allelic / intragenic interaction

(incomplete dominance, codominance, over dominance)

2. Non allelic or intergenic gene interaction

a. novel phenotype

b. Epistasis

1. Complementary action 9:7


2. Inhibiting action 13:3


3. Duplicating action 15:1


4. Modifying/supplementary 9:3:4


5. Additive/polymeric 9:6:1


6. Masking / 12:3:1

9 complements 7

13 inhibits 3

15 duplicates 1

9 modifies 3 n 4

9 adds 6 n 1

12 masks 3 n 1

3. Pleiotropic effect

(Lethal gene action, semi/sub lethal gene, vital gene, sub vital genes, super vital genes)