Bio 322 Final Exam Questions and Complete Solutions

Incomplete penetrance Penetrant organisms have the genotype and express the phenotype. Non penetrant organisms have the genotype but don't express the phenotype. (penetrant)/(total penetrant+ non penetrant) No gene interaction 9:3:3:1 9/16 A_B_ 3/16 A_bb 3/16 aaB_ 1/16 aabb Complementary gene interaction 9:7 9/16 A_B_ 7/16 A_bb or aaB_ or aabb Duplicate gene interaction 15:1 15/16 A_B_ or A_bb or aaB_ 1/16 aabb Dominate gene interaction 9:6:1 9/16 A_B_ 6/16 A_bb or aaB_ 1/16 aabb Dominate epistasis 12:3:1 12/16 A_B_ or A_bb 3/16 aaB_ 1/16 aabb Recessive epistasis 9:3:4 9/16 A_B_ 3/16 A_bb 4/16 aaB_ or aabb Dominate suppression 13:3 9/16 A_B_ 3/16 A_bb 4/16 aaB_ or aabb Prototroph can grow on any media Auxotroph mutant that requires a growth factor What do supplements before permit?after? before permits any growth after blocks growth Complementation mutants in different genes result in wild type No complementation mutants in same gene result in mutant progeny