LIFESCI 7B
Genetics, Evolution, and Ecology
Lecture and lab.
Fall 2026: 1 lecture and 16 discussions. Nothing here is open. The oldest of these readings was 23 hours ago.
Grades
3.59
Average grade awarded in LIFESCI 7B. Not a student rating: this is what the grades were.
In the A range
68%
of the 9,839 letter grades
D, F or W
0.8%
of every letter grade awarded, plus withdrawals
Taken pass/no pass
-
the registrar has this letter grade only this term
The registrar's own records: 9,839 grades over 17 terms, Fall 2021 to Fall 2025. Every instructor is pooled here.
What is inside that record
4 of those terms are summer sessions, and summer sessions are counted here.
The table below splits them, and term averages across those 17 terms ran 3.37 to 3.80.
Historical grades for ANDRES-BRAY, TYLER, across recorded terms. The course summary above includes all professors.
- A 87 · 33.1%
- A- 66 · 25.1%
- B+ 40 · 15.2%
- B 38 · 14.4%
- B- 17 · 6.5%
- C+ 8 · 3.0%
- C 7 · 2.7%
Percentages are of the 263 letter grades. Grey bars are non-letter outcomes.
How the non-letter outcomes are counted
They are excluded from the GPA entirely rather than scored, because counting a P as a 4.0 would be a fabrication.
By instructor
| Instructor | Predicted GPA | Raw | n | Terms | A range | Workload | Fall 2026 |
|---|---|---|---|---|---|---|---|
| PIRES, DEBRA B reviews ↗ | 3.54 | 3.54 | 4,233 | 12 | 64% | average | not teaching it |
| KANE, TONYA LYNN reviews ↗ | 3.63 | 3.63 | 1,598 | 9 | 70% | average | not teaching it |
| MARCOT, JONATHAN DAVID reviews ↗ | 3.57 | 3.57 | 1,540 | 5 | 67% | light | not teaching it |
| PHAM, HUNG DINH reviews ↗ | 3.72 | 3.72 | 1,321 | 3 | 77% | light | not teaching it |
| BURTON, ANDREA reviews ↗ | 3.50 | 3.50 | 699 | 3 | 60% | very light | not teaching it |
| PHELAN, JOHN PATRICK reviews ↗ | 3.67 | 3.67 | 564 | 2 | 76% | average | not teaching it |
| LYNCH, JESSICA W reviews ↗ | 3.49 | 3.49 | 382 | 1 | 56% | - | not teaching it |
| AGUILLON, STEPFANIE reviews ↗ | 3.54 | 3.54 | 381 | 1 | 62% | - | not teaching it |
| ANDRES-BRAY, TYLER reviews ↗ | 3.49 | 3.48 | 263 | 1 | 58% | - | Closed by the department |
| JOHNSON, JANA JOAN reviews ↗ | 3.43 | 3.36 | 38 | 1 | 58% | - | not teaching it |
Why Predicted is not the Raw average
“Predicted” is shrunk toward the course average, which is itself shrunk toward the department, so an instructor with a handful of students sits near the course mean rather than topping the list.
Grade records describe outcomes. For what a course is like to take, read student reviews written on dibs below or follow the separate external review link.
Workload and assignments
Reported assignments across instructors and terms. This term's syllabus may differ.
What the work looks like
- 2 exams, 8 mentions in past reviews
- 1 quiz, 3 mentions in past reviews
- Problem sets mentioned, no number given, 4 mentions in past reviews
- No labs, 2 mentions in past reviews
Based on 146 reviews; source checked 7 days ago. dibs counts only what a review actually states, so a kind of work nobody mentioned is absent rather than zero.
What comes first
The chain dibs can see is 1 course long before LIFESCI 7B. dibs has read a class page for every course in it.
Counted in courses rather than quarters: dibs does not know which of them a department lets you take together.
In Falls
Ran in 5 of the last 5 Falls.
From the terms dibs holds, which start in Fall 2021 and exclude summer. A department can run a course in a quarter it never has before.
From the registrar's catalog
Lecture, three hours; laboratory, 80 minutes. Enforced requisite: course 7A. Principles of Mendelian inheritance and population genetics. Introduction to principles and mechanisms of evolution by natural selection, population, behavioral, and community ecology, and biodiversity, including major taxa and their evolutionary, ecological, and physiological relationships. Letter grading.
Sections in Fall 2026
Choose an open discussion to enroll; an open lecture alone does not mean a seat is available.
Seat counts as of : the oldest of these 17 readings. Seat readings are snapshots, not live availability. Their timestamps show when dibs last checked.
-
Seats
Closed by the departmentLecture: 360 enrolled
Instructor
3.49Predicted GPA
Historical records for ANDRES-BRAY, TYLER; 263 letter gradesSeat risk
no history16 discussions, none open. No waitlist listed.Every discussion, with its time and seats: 16 discussions
-
Closed by the department
22 enrolled
-
Closed by the department
24 enrolled
-
Closed by the department
24 enrolled
-
Closed by the department
24 enrolled
-
Closed by the department
24 enrolled
-
Closed by the department
24 enrolled
-
Closed by the department
22 enrolled
-
Closed by the department
20 enrolled
-
Closed by the department
23 enrolled
-
Closed by the department
23 enrolled
-
Closed by the department
22 enrolled
-
Closed by the department
22 enrolled
-
Closed by the department
24 enrolled
-
Closed by the department
23 enrolled
-
Closed by the department
20 enrolled
-
Closed by the department
19 enrolled
-
Final enrollment, averaged across each term's sections: between 151 and 362 a term over 12 terms, summer excluded, most recently 201 in Fall 2025. That is the shape across years, not this term, which is above.
From the people who took it
Student reviews
What taking LIFESCI 7B was like: the work, the teaching, and what students wish they’d known.
Your experience could be the first.
No student reviews are available to read on dibs for this course yet. Took it? Tell the next person what helped, what was hard, and how you spent your time.
Looking for more perspectives?
External reviews are separate and do not count toward the dibs rating.
Seats over time in Fall 2026
How each lecture has filled since dibs first saw it.
A dot is a reading where something moved: the seat count, the status, or the waitlist.
What a flat run means, and where a line starts
Flat between dots means it did not drift, it held and then jumped, and a line starts when dibs first saw that lecture rather than reaching back before it existed. A lecture that has never moved draws a flat line across the whole window, and one with two or three readings draws a line joining them, which is too few to read a trend from.
Lec 1 · Andres-Bray, T. · 360 enrolled
Nothing read since 16 Oct, 20 hours ago. Over the 2 months before that, filled by 32.
How readings and alerts work
Dated seat counts can be available even when hourly check history is missing. Gaps do not show whether seats changed between observations.
Seat counts show the last successful read, not live availability. Refreshes can be delayed by request limits or upstream interruptions. Watched sections receive priority, but an hourly update for every section is not guaranteed.
The registrar can change a seat count between our checks. Alerts depend on dibs detecting an opening and completing delivery; a quiet watch does not prove that no seat opened. Check the registrar before enrolling.