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MCD BIO 50 · Lec 1

Stem Cell Biology, Politics, and Ethics: Teasing Apart Issues

Fall 2026Lee, P.5 units

Seats, time, final and grades

Seats

Open, 2 seats left.

118 of 120 enrolled, lecture and all discussions summed.

Meets

TR 11:00am-12:15pm

Lecture only. You also attend a discussion, listed below.

Final

Wed 9 Dec, 8:00am to 11:00am

One exam for the whole class, Los Angeles time.

Read 14 hours ago.

Grades

3.77
predicted, this instructor · 987 grades

987 letter grades, Lee, P..

Read 52 minutes ago. This is a recent reading, not a live seat count.

dibs has seen this section open 3 times since 17 August. The last time was 1 October.

Enroll on the registrar (opens in a new tab) Sign in to watch for an opening

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Put this class on a board

A board is one quarter you are drafting, so it needs an account to live in. Signing in brings you straight back to this page, with this class still in front of you.

Before you can enroll

From the registrar limited early, then open

Seats are held for entering students who enroll through New Student Orientation sessions beginning July 2, 2026. New student restrictions will be lifted on September 15, 2026 at 8 a.m.

The limit stands until 15 September, and lifts then. dibs still counts this class as one you can take, but not yet.

Discussions

You enroll in the discussion, not the lecture, so the seat figure above is the sum across all of them and can read open while every discussion you could actually join is full.

6 discussions, 2 open: Dis 1C, R 3:00pm-3:50pm, and Dis 1E, F 10:00am-10:50am.

  • Dis 1A

    R 1:00pm-1:50pm

    Fang, Y.

    Closed.

  • Dis 1B

    R 2:00pm-2:50pm

    Fang, Y.

    Closed.

  • Dis 1C

    R 3:00pm-3:50pm

    Fang, Y.

    Open, 1 seat left.

  • Dis 1D

    F 9:00am-9:50am

    Mack, P.

    Closed.

  • Dis 1E

    F 10:00am-10:50am

    Mack, P.

    Open, 1 seat left.

  • Dis 1F

    F 11:00am-11:50am

    Mack, P.

    Closed.

When it meets

Mon
Tue
Wed
Thu
Fri
6am
7am
8am
9am
10am
11am
12pm
1pm
2pm
3pm
4pm
5pm
6pm
7pm
8pm
9pm
10pm

Meets: TR 11:00am-12:15pm

Discussions: R 3:00pm-3:50pm · F 10:00am-10:50am

Kinsey Science Teaching Pavilion 1200B

Grades

3.77
predicted, this instructor · 987 grades

1 other person has taught MCD BIO 50 in the grade record: AUSTIN, TINA ROSA at 3.82 over 216 grades.

A range
84%
P/NP
2%
D/F/W
0.8%

Full grade history for MCD BIO 50

What students say

dibs measures outcomes: grades, seats, how fast it fills. For what the class is actually like to sit in, BruinWalk has the reviews.

Workload, light. 4.0 of 5 for Peiyun Lee, where 5 is lightest. Read 30 days ago.

dibs has read this course’s reviews and none of them say what kind of work it sets, so dibs has nothing to show rather than a guess. Read from 116 reviews about 1 month ago. That is the reviewers being silent, and not a course that sets no work.

MCD BIO 50 reviews for Peiyun Lee Reviews for all professors of MCD BIO 50

Will it still be here

high risk chance of closing before your enrollment pass.

Final enrollment per term from four years of grade data. Summer excluded: different population, different pass structure.

  • 11321F
  • 11822W
  • 7322S
  • 11822F
  • 11823W
  • 7423S
  • 11723F
  • 11424W
  • 7524S
  • 11524F
  • 10425W
  • 9425F
Enrollment by term: 21F 113, 22W 118, 22S 73, 22F 118, 23W 118, 23S 74, 23F 117, 24W 114, 24S 75, 24F 115, 25W 104, 25F 94

Peak 118 · most recent 25F at 94

Seats over time

Filled by 60 over about 2 months

3 times reopened
118 of 120 · 2 left in its discussions
17 Aug 12:329 Sep 02:221 Oct 16:12
dibs read 168 of the 544 hours its hourly record covers, 31%, and did not look in 376. dibs had no hourly record before 9 Sep, which is the other 541 of 1085 plotted.118 of 120 enrolled at the newest reading, 52 minutes ago, with 2 left in its discussions. Seats from 17 Aug 12:32 to 1 Oct 16:12, 58 to 118. dibs read 168 of the 544 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 376 hours dibs was keeping a record and did not reach this section. Nothing before 9 September at 01:00, where this section's record starts, has a read either way, which is 541 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.

A dot is a reading where something moved: the seat count, the status, or the waitlist. Flat between dots joins recorded counts; changes between reads may be missed. The line starts when dibs first saw this section rather than reaching back before it existed. The last one is the last time dibs read this section, moved or not: 52 minutes ago.

Show the readings (74)
Recorded Enrolled Capacity Status Waitlist Hours read
1 Oct 16:12 118 120 open - 1 of 1
1 Oct 16:12 118 120 open - 5 of 15
1 Oct 02:22 119 120 open - 8 of 23
30 Sep 04:12 120 120 closed - 2 of 6
29 Sep 23:42 119 120 open - 2 of 4
29 Sep 20:12 120 120 closed - 5 of 15
29 Sep 06:12 119 120 open - 4 of 11
28 Sep 20:02 120 120 closed - 2 of 5
28 Sep 16:32 117 120 open - 2 of 4
28 Sep 13:02 119 120 open - 5 of 15
27 Sep 23:12 117 120 open - 2 of 5
27 Sep 19:42 116 120 open - 2 of 4
27 Sep 16:52 117 120 open - 13 of 42
25 Sep 23:12 116 120 open - 2 of 5
25 Sep 19:42 117 120 open - 8 of 24
24 Sep 20:32 116 120 open - 2 of 4
24 Sep 17:02 114 120 open - 2 of 5
24 Sep 13:32 113 120 open - 4 of 12
24 Sep 02:02 110 120 open - 3 of 8
23 Sep 19:02 107 120 open - 3 of 8
23 Sep 12:22 104 120 open - 6 of 18
22 Sep 19:42 103 120 open - 3 of 7
22 Sep 13:12 102 120 open - 4 of 11
22 Sep 03:52 103 120 open - 2 of 4
22 Sep 00:22 104 120 open - 3 of 8
21 Sep 17:22 103 120 open - 6 of 18
21 Sep 00:02 102 120 open - 19 of 55
18 Sep 18:32 101 120 open - 2 of 4
18 Sep 15:12 99 120 open - 5 of 14
18 Sep 02:22 101 120 open - 3 of 8
17 Sep 19:22 100 120 open - 2 of 5
17 Sep 15:52 99 120 open - 5 of 16
17 Sep 00:52 100 120 open - 3 of 7
16 Sep 18:12 99 120 open - 5 of 14
16 Sep 05:22 96 120 open - 2 of 4
16 Sep 02:02 95 120 open - 4 of 11
15 Sep 16:12 94 120 open - 2 of 5
15 Sep 12:42 95 120 open - 27 of 87
11 Sep 22:42 75 120 open - 11 of 34
10 Sep 13:40 70 120 open - 7 of 13
10 Sep 01:40 70 112 open - 10 of 25
9 Sep 01:40 68 112 open - 1 of 2, 1 no hourly record
9 Sep 00:40 68 105 open - no hourly record
8 Sep 19:40 68 112 open - no hourly record
5 Sep 02:40 68 105 open - no hourly record
3 Sep 11:27 66 105 open - no hourly record
1 Sep 01:40 66 98 open - no hourly record
26 Aug 01:55 65 98 open - no hourly record
25 Aug 22:40 62 98 open - no hourly record
25 Aug 21:55 65 98 open - no hourly record
25 Aug 20:55 62 98 open - no hourly record
25 Aug 20:40 65 98 open - no hourly record
24 Aug 19:55 62 98 open - no hourly record
24 Aug 17:55 62 91 open - no hourly record
24 Aug 15:55 62 98 open - no hourly record
24 Aug 14:55 62 91 open - no hourly record
24 Aug 13:55 62 98 open - no hourly record
24 Aug 11:55 62 91 open - no hourly record
24 Aug 10:55 62 98 open - no hourly record
24 Aug 01:55 62 91 open - no hourly record
22 Aug 00:55 63 91 open - no hourly record
21 Aug 23:55 59 91 open - no hourly record
21 Aug 22:55 63 91 open - no hourly record
21 Aug 21:55 59 91 open - no hourly record
21 Aug 20:55 63 91 open - no hourly record
21 Aug 01:55 59 91 open - no hourly record
20 Aug 22:55 58 91 open - no hourly record
20 Aug 21:55 60 91 open - no hourly record
20 Aug 20:55 58 91 open - no hourly record
20 Aug 19:55 60 91 open - no hourly record
20 Aug 18:55 58 91 open - no hourly record
20 Aug 17:55 60 91 open - no hourly record
19 Aug 17:55 58 91 open - no hourly record
17 Aug 12:32 58 84 open - -
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.

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