BIOL 239Genetics
- Units
- 0.50
- Faculty
- Science
- Subject
- Biology
When it runs
- F24
- W25
- S25
- F25
- W26
- S26
- F26
- W27
- S27
Ran in 7 of the last 7 terms. Winter 2027: scheduled, 4 lecture sections. Spring 2027: schedule not out yet.
Introduces major concepts in genetics, from DNA to its effects at the cellular, organismal, and population levels, and uses in biotechnology. Topics include Mendelian inheritance patterns, chromosomal mechanisms in mitosis and meiosis, mechanisms and effects of mutations, gene expression, natural selection, and methods of analysis. Students will learn the basics of using genetics data such as family trees, results of breeding experiments with model organisms, and DNA sequences. Tutorials cover some lecture content in more detail and provide additional opportunities to apply knowledge.
Prerequisites
None listed.
Antirequisites
None listed.
Leads to
Fall 2026 sections
| Section | Class | Enrolled | Meets |
|---|---|---|---|
| LEC 081 | 7281 | 213 / 220 | Online or by arrangement |
Winter 2027 sections
| Section | Class | Enrolled | Meets |
|---|---|---|---|
| LEC 001 | 6630 | 91 / 446 | MWF 12:30–13:20 |
| LEC 002 | 6631 | 0 / 446 | MWF 13:30–14:20 |
| LEC 003 | 7668 | 0 / 250 | MWF 10:30–11:20 |
| LEC 701 | 2473 | 868 / 9999 | Online or by arrangement |
Reviewed on UW Flow
72% liked it60% easy84% useful
From 505 ratings and 108 comments on UW Flow. The most helpful comments, quoted as written, without names. Read them all on UW Flow.
This course is very interesting & features a very generous marking scheme: A free 5% for completing online learning activities, 25% midterm, 40% exam, and 30% tutorial (further broken down into a bunch of things: a free 2% for viewing videos, 3% for tutorial group work, 5% for a very short, online (open book) quiz, 7% report, 4% for another group work, 2% subjective mark, 7% tutorial exam). You should take advantage of the tutorial and use it as a mark booster. The content of the course is a mix of high school review with a bit of new stuff, and the focus is less on mass memorization and more on application of concepts than your typical biology course. Everything you need to know is in…
Apr 2018 · liked it · 5 found this helpfulOn UW FlowRemove this
Man this course is a mess. Why are we in week 12 getting tested on week 6 content? There are 3 midterms each worth 10% that only test you on up to week 6 content, they're tricky but you can do well if you study effectively (use practice tests and smartbook). The exam consists of approximately 80% of questions based on content after the last midterm so you have to learn half of the course content with basically no relevant practice to prepare for the exam. All of that ontop of the fact that the content post-midterms is significantly more challenging. The horrific layout of the course is reflected in how bad the exam avg was (60%). The tutorials are essentially useless and yet still mandatory…
Apr 2025 · didn’t like it · 3 found this helpfulOn UW FlowRemove this
This class was my favourite biology class to date. The concepts are fairly easy and but like all biology courses, there are a lot of terms. Most people found the term tests and final difficult but if you put in the work and really apply yourself it will come. I highly recommend doing the smart book activities as its an easy 4% back. Also, note that completing these activities is a very useful way to study. You MUST actually read the textbook when doing these activities. Also for some study tips for the test make a Quizlet throughout the year for all of the lecture sets (terms on one side and images and notes on the other). Then when it's time for a test get out a notebook and write down and…
Jun 2022 · liked it · 3 found this helpfulOn UW FlowRemove this
I went into this class very hopeful because I love genetics. To say I was disappointed would be the understatement of the century. This class was so boring I shed tears every time 10:30am on mwf rolled around. All the prof did was read off the slides. The tests were nothing like the content taught in the class, the only thing similar to the tests were the practice tests that were also nothing like the course content. I have never seen someone make a subject that is relatively easy seem so hard. The way she worded her questions is criminal and it makes me believe that maybe I never actually learned this in high school and it was all a dream. The tutorials were so disorganized and all we did…
Apr 2025 · didn’t like it · 2 found this helpfulOn UW FlowRemove this
This course had so much potential to be fun and engaging because of the content itself, however the delivery made it suck. The midterms (3x10%) were not tested in a timely manner, we were on week 5 or 6 getting tested on weeks 1 and 2, so by the time we had finished 3 midterms we only got tested on 10-11 lectures out of 21. Meaning that the content for the final exam was extensive with little to no relevant practise. This class is a pay to win as the smartbook bonuses are an additional $100 for a 5% boost. which isnt even worth it because there are 12 in total and each takes 2-3 hours to complete. They also were not sequenced properly as the first 6 were due by the end of february and the…
Apr 2025 · didn’t like it · 2 found this helpfulOn UW FlowRemove this
Discussed on r/uwaterloo
317 posts and comments in 245 threads mention BIOL 239, October 2012 to December 2024. Quoted word for word, newest first; each reply sits under the post and the comment that started its branch. Search r/uwaterloo for newer posts.
Fall 2024
It’s a fucking Christmas Miracle 85 points, 3 comments
u/UoWPanda: “An hour ago I posted about how I didn’t know if I was gonna pass BIOL 239 because I spam guessed on the exam. Well guess what? I woke up for a minute, decided to check and with my heart pounding I somehow got in. And then I find out I passed genetics. LETS. FUCKING. GO. …”
I’m about to go to sleep and I hope I wake up to a Christmas miracle. 78 points, 4 comments
u/UoWPanda: “On December 7th I wrote an exam for BIOL 239. The passing condition for the class was that you would need to get a passing average between your quizzes and your final exam. The quizzes in total are worth 40% and the exam is worth 38%. …”
Biol239 final 5 points, 0 comments
u/Jumpy-Consequence-94: “3 days left till biol239 final and IM NOT READY Especially this term the course was online so idk how to prepare for the exam.. I reviewed all the materials but I’m just so worried 😭 Any tips or reviews from the previous takers? 🥺”
biol 359 - hugh broders 1 point, 2 comments
“anyone ever take this course w him? if so, what was ur experience? thanks :))”
u/Exit_exe_: “… for the course itself its just memorization and some of the material is common sense or it was taught in biol 239 (genetics). …”
I have too much courses want to take 4 points, 14 comments
u/Eileen1202: “… And I also founded out that honors of applied math need PHYS121 💀 My wishlist is: - science PHYS121 (If I have to take) BIOL 239 BIOL 240 BIOL 341 virology or virus related and some required courses abou applied bio/math in bio stuffs anatomy (if possible) some health courses …”
BIOL 130 VS BIOL 239 VS BIOL 240 VS BIOL 273 1 point, 8 comments
u/ComprehensiveBack767: “… FOR REFERENCE: Biol 130 - Instructor Sarah Ruffell or Vivian Dayeh Biol 239 - Instructor (online) Biol 240 - Instuctor Josh D. …”
u/Altruistic-Set1428: “… Biol 239 i found the first half boring, second half was more enjoyable for me.”
u/ComprehensiveBack767: “Thank you! How was the syllabus and the tests for BIOL 239?”
u/SwingDue7753: “I have the lab manual for biol 239 if anyone needs it”
Spring 2024
Health Sciences Year 2 1 point, 3 comments
u/No_Junket5699: “… HLTH 205 Introduction to Health Research KIN 217 Human Biochemistry (now HLTH 217) 2B: BIOL 239 Genetics HLTH 230 Introduction to Health Informatics HLTH 260 Social Determinants of Health I'm also planning on taking BIOL 239 in my 2A term, as it's offered online. …”
u/Dimtar_: “… than difficult - same for HLTH 260, it seems birdy but you may be surprised - KIN 217/BIOL 239 are pretty tough but if you stay caught up you’ll be fine. …”
u/SwingDue7753: “I have the textbook for 205 if you're interested. The final exam has some major concepts tested from the textbook.”
u/SwingDue7753: “I’m selling the textbook if you’re interested in buying . I’m also selling the lab manual for BIOL 239 if you’re interested”
Biol 239 1 point, 0 comments
BIOL 239 Exam 1 point, 0 comments
BIOL 239 Exam 1 point, 0 comments
Biol 239 Final 1 point, 1 comment
u/Good-Acanthaceae9645: “I am curious on how everyone found this final. Was it similar to the practice exam/practice in class? Taking it next sem.”
USED TEXT BOOKS (CHEM 120, BIOL 239, HLTH 101, BIOL 201) 1 point, 2 comments
Check it elsewhere for Fall 2026
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