1 - You will input the class in the semester you plan on taking it (either fall or spring) and then in the top right corner of the term you select it will say "Term", "Year", "Academic Status" and then "Completition Status" this is where you will put "In Progress/Planned" for the courses. So you don't need grades but schools can see that you've at least planned them out. You will have to have some idea. It's okay to put them for the fall, and if you don't end up taking it then, there will be an academic update period sometime in December where you can edit your transcript entry and resubmit that to schools to get it updated for the spring.
2. No, has to be general biology. Genetics would count as an upper-division science elective course if schools have that slot to fill in when marking prerequisites
3. No, must be general chemistry. Analytic chemistry would again just be an upper-division science elective. Some schools may use analytical chemistry if your school uses a 3-semester chemistry sequence (mine did, so I could have used analytical chemistry, I used chemical biology instead, had no issues with schools accepting it except for Marquette)
4. Not that I'm aware of, if you have the ADEA dental school explorer it will tell you there if schools accept AP credits or not. Maybe I'll use my subscription to add onto a google sheet and have that available to applicants. I can start working on it tonight. Will take a little bit of time, however.