Straight from the book. Give all possible genotypes of a lac operon that produce
ID: 41901 • Letter: S
Question
Straight from the book. Give all possible genotypes of a lac operon that produces ?-galactosidase and permease under the following conditions.
Do not give partial diploid genotypes.
Lactose absent Lactose present
?-Galactosidase Permease ?-Galactosidase Permease
a. ? ? + +
b. ? ? ? +
c. + + + +
Explanation / Answer
LACTOSE ABSENT LACTOSE PRESENT
a) Y- Z- OR Y+Z-OR Y+Z+ a) Y+Z+
b) Y-Z- OR Y+Z- OR Y+Z+ b) Y+Z- OR Y+Z+
c) Y+Z+ c) Y+Z+
Z-galactosidase
Y-permease