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LIFESCI 7B

Genetics, Evolution, and Ecology

5 units

Sections & times

Lecture and lab.

Fall 2026: 1 lecture and 16 discussions. 1 lecture and 5 discussions are open. The oldest of these readings was 2 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

Predicted GPA, raw average, sample size, terms, A range and the workload reviewers reported for every instructor with a grade record in this course
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% - 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% - Open, 19 seats left
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.

Reviews for LIFESCI 7B

Workload and assignments

Work types reported in BruinWalk reviews of this course, across recorded instructors and terms. They may differ from this term's syllabus.

dibs has not read this course’s reviews, so it cannot say what kind of work it sets. That is dibs not having looked. It is not a course without papers or exams, and the reviews linked below are the answer until dibs catches up.

Read the source reviews

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

You enroll in the discussion, not the lecture, so a discussion's status is the one that decides whether you get in. A lecture can read open while every discussion under it is full.

Seat counts as of : the oldest of these 17 readings. Seat readings are snapshots, not live availability. Their timestamps show when dibs last checked.

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.

Write a review

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.

Read reviews on BruinWalk

Community guidelines

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. · 365 of 384 enrolled

Nothing read since 1 Oct, 2 hours ago. Over about 2 months before that, filled by 37.

365 of 384 · 19 left in its discussions
17 Aug 15:079 Sep 05:591 Oct 20:52 · 2 hours ago
dibs read 168 of the 542 hours its hourly record covers, 31%, and did not look in 374. dibs had no hourly record before 9 Sep, which is the other 544 of 1086 plotted.365 of 384 enrolled at the newest reading, 2 hours ago, with 19 left in its discussions. Seats from 17 Aug 15:07 to 1 Oct 20:52, 328 to 365. dibs read 168 of the 542 hours its hourly record here covers, 31%. An hour marked as read confirms a check, not continuous monitoring. That check recorded no change; changes between checks may be missed. For 374 hours dibs was keeping a record and did not reach this section. Nothing before 9 September at 07:00, where this section's record starts, has a read either way, which is 544 hours of this window. Where the drawing is faint or broken, that never means the readings are doubtful. It means the stretch between them is unaccounted for.
How readings and alerts work

A reading and an hourly record are different things, and most charts here hold more of the second missing than present. dibs has taken readings of a section since long before it began keeping an hour-by-hour log of when it looked, so the empty stretches are dibs saying it was not keeping that log yet, not that it looked and found nothing. That is the age of the record and not a fault.

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.