Great lectures, super knowledgeable.
Lecture is heavily based on experiments and their findings. No textbook is needed, since all class materials are the lecture powerpoint slides and a few readings (optional). Lecture is not podcasted, so definitely would recommend to audio record and create detailed notes after each lecture (either by yourself or collaborate with others) to understand the concepts covered in class and to prepare for the quizzes.
Since there is no midterm/final, the grade is based on 4 quizzes (approximately 3-4 lectures per quiz). Each quiz is 6 short answers (free response that can be answered in ~4 sentences) about overall concepts and experiments. The score is curved (average for 1st quiz is ~6/12, which is ~C+/B- after converting it into a 4.0 scale). The best score counts 37.5% of your grade, and the worst score counts 12.5% of your grade. The middle 2 each count 25%. The quizzes are not cumulative, but they require knowledge of prior material.
Overall, a great class for psychobiology.

If you have the chance to take 112B with Fanselow, go for it. He is the most articulate professor I have ever had at UCLA and he explains concepts in such a clear, concise way that it's practically impossible for you not to get lower than at least a B on his quizzes if you go to class and pay attention. As long as you give your notes a quick review before the test you should be fine. I got a D on the first quiz because I didn't really take it seriously but then tried a bit harder on the later quizzes (which were all sort of basic question and answer) and ended up with an A in the course. It probably also helps that he's actually studied in the field he's teaching so he knows everything about what he's talking about. He always stopped to answer everyone's questions and has mastered the perfect teaching pace. He turns what would otherwise be a really boring subject into something fascinating and important.

I enjoyed Professor's Fanselow. However, you can know the material and fail his tests. The questions are ambiguous and he places too much faith in his TA's ability to grade. If Stephanie Groman is your TA, I suggest that you drop because unless you use exact wording then she will give you zero points.