Lab: Some of the flies are being recalcitrant, and people are struggling to get the complete set of crosses done. If you have all of your crosses set up, move your flies now to the incubator at the back of the room. If you have a stock bottle that's been working well to produce virgin flies, remove any post-its you have on it and leave it out for others to use.

Exam: The mean was 70, range 30-97. We'll go over the answers in class today, and finish up chapter 4, I hope.

Readings: We're going to skip ahead a little bit in the book. Read chapter 7 for Wednesday — we're going to look at sex and genetics.

Problems from Ch. 7: 1, 2, 3, 5, 6, 9, 11, 16, 17.