01:960:285 Lecture 25: 8.3

Let p and q be the propositions P: I bought a lottery ticket this week. Q: I won the million-dollar jackpot. Express each of these propositions as an English sentence. a) P b) p q c) p rightarrow q d) p q e) p doubleheadarrow q f) p rightarrow q g) p q h) p (p q

Give the levels of B-galactosidase activity (+ or -) expectedfor the following merodiploids for the lac operon.

Lactose Absent/ Lactose Present

1.) I+ P+ O+ Z- / I+ P- O+ Z+ _____ _____

2.) I+ P+ O+ Z- / I- P+ O+ Z+ ______ ______

3.) I+ P+ Oc z- / I+ P+ O+ Z+ ______ _____

4.) I- P+ Oc Z+ / I+ P+ O+ Z+ ______ _____

5.) I+ P+ Oc Z+ / Is P+ O+ Z+ ____ _____

Please explain!