BIO 325Upper division3 credit hours
BIO 325 Genetics
Since 2011, BIO 325 has averaged 3.13 with 34% A’s. In Spring 2026 it averaged 2.88, below the 3.37 average for undergraduate BIO classes that term.
Registration detailsBefore you register
Listed for Spring 2027 · UT’s published schedule
UT prerequisites and restrictions
- Prerequisites
- Biology 311C and 311D with a grade of at least C- in each and credit or registration for Statistics and Data Sciences 320E, 321, or 302F.
- Catalog edition
- 2026–27
- Class hours a week
- 4
- Grading
- Letter grade or pass/fail, your choice
- Repeat for credit
- No
Grade distribution
Spring 2026: 584 letter grades, 2.88 average GPA, 30% A’s, 24 sections
Bars show the selected term. Short lines show all terms combined.
Grade counts
| Grade | Students | Share | All terms |
|---|---|---|---|
| A | 174 | 29.8% | 34.4% |
| A− | 60 | 10.3% | 12.0% |
| B+ | 54 | 9.2% | 9.6% |
| B | 59 | 10.1% | 14.3% |
| B− | 47 | 8.0% | 7.2% |
| C+ | 44 | 7.5% | 5.1% |
| C | 49 | 8.4% | 8.1% |
| C− | 20 | 3.4% | 3.3% |
| D+ | 15 | 2.6% | 1.2% |
| D | 22 | 3.8% | 1.8% |
| D− | 8 | 1.4% | 0.7% |
| F | 32 | 5.5% | 2.3% |
| Q, W, CR, and others | 112 | Not in the average | |
How have grades changed?
UT’s grade reports show 46 terms from Summer 2011 to Summer 2026 (15 falls, 15 springs, and 16 summers).
Grades by term
| Term | Sections | Letter grades | Average GPA | A’s |
|---|---|---|---|---|
| Summer 2026 | 5 | 305 | 3.34 | 35.4% |
| Spring 2026 | 24 | 584 | 2.88 | 29.8% |
| Fall 2025 | 55 | 1,482 | 3.28 | 40.8% |
| Summer 2025 | 4 | 275 | 3.45 | 25.8% |
| Spring 2025 | 22 | 400 | 2.81 | 22.5% |
| Fall 2024 | 32 | 1,341 | 3.28 | 46.5% |
| Summer 2024 | 6 | 169 | 3.72 | 66.9% |
| Spring 2024 | 18 | 558 | 2.85 | 24.9% |
| Fall 2023 | 55 | 1,612 | 3.29 | 37.8% |
| Summer 2023 | 4 | 175 | 3.71 | 65.7% |
| Spring 2023 | 12 | 638 | 2.69 | 16.5% |
| Fall 2022 | 68 | 1,377 | 3.16 | 38.3% |
| Summer 2022 | 4 | 124 | 3.61 | 55.6% |
| Spring 2022 | 26 | 481 | 2.83 | 20.0% |
| Fall 2021 | 68 | 1,497 | 3.34 | 46.4% |
| Summer 2021 | 5 | 129 | 3.61 | 63.6% |
| Spring 2021 | 31 | 425 | 3.17 | 31.3% |
| Fall 2020 | 65 | 1,429 | 3.55 | 56.9% |
| Summer 2020 | 7 | 229 | 3.74 | 69.0% |
| Spring 2020 | 35 | 572 | 3.50 | 47.4% |
| Fall 2019 | 69 | 1,421 | 3.19 | 36.2% |
| Summer 2019 | 7 | 133 | 3.24 | 50.4% |
| Spring 2019 | 35 | 678 | 3.01 | 30.1% |
| Fall 2018 | 68 | 1,301 | 3.24 | 38.5% |
| Summer 2018 | 8 | 163 | 3.19 | 36.2% |
| Spring 2018 | 36 | 712 | 3.08 | 24.9% |
| Fall 2017 | 56 | 1,094 | 3.10 | 27.6% |
| Summer 2017 | 8 | 223 | 3.14 | 32.7% |
| Spring 2017 | 37 | 761 | 3.01 | 26.1% |
| Fall 2016 | 46 | 973 | 3.14 | 34.0% |
| Summer 2016 | 8 | 195 | 3.11 | 36.9% |
| Spring 2016 | 26 | 549 | 2.90 | 23.3% |
| Fall 2015 | 40 | 899 | 2.92 | 23.2% |
| Summer 2015 | 4 | 147 | 3.29 | 53.7% |
| Spring 2015 | 36 | 638 | 2.89 | 25.4% |
| Fall 2014 | 50 | 1,061 | 2.86 | 21.6% |
| Summer 2014 | 4 | 126 | 2.72 | 25.4% |
| Spring 2014 | 34 | 540 | 2.88 | 30.9% |
| Fall 2013 | 54 | 1,223 | 2.99 | 28.8% |
| Summer 2013 | 7 | 184 | 3.13 | 38.0% |
| Spring 2013 | 38 | 667 | 2.88 | 24.9% |
| Fall 2012 | 47 | 1,111 | 3.03 | 27.0% |
| Summer 2012 | 8 | 136 | 3.00 | 27.2% |
| Spring 2012 | 33 | 644 | 2.95 | 23.1% |
| Fall 2011 | 47 | 1,044 | 3.03 | 28.8% |
| Summer 2011 | 8 | 148 | 2.97 | 21.6% |
What’s BIO 325 about?
Basic principles of Mendelism, molecular genetics, structure and function of genes and chromosomes, populations and evolution. Biology 325 and 325H may not both be counted. Three lecture hours and one discussion hour a week for one semester.
Prepare for class
- Mendelian inheritance
- Genes and chromosomes
- Population genetics
Review · Try a one-gene Punnett square before moving to two traits.
Self-check · Two Aa parents have a child. Under simple Mendelian inheritance, what is the chance of aa?
Show the answer
One in four. Each parent passes on a with probability one-half.
Instructor evaluations
UT posts its course evaluation results as one public list per term. Open a term and look for BIO 325 in it: Spring 2026 · Fall 2025 · Summer 2025 · Spring 2025.
UT’s CES ratings search · Results before Fall 2022 · Syllabi and evaluations for BIO 325
The guide links UT’s own results and copies no numbers.
What comes before and after?
Courses named by UT
This class
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You can get credit for only one of these
Sources
The Spring 2027 listing comes from UT’s printed schedule, checked November 9, 2026.
Class details come from UT’s Biology catalog page, 2026–27 edition, checked October 27, 2026. Match requirements to your own catalog and degree plan.
Grades come from UT’s grade dashboard, updated October 27, 2026. UT leaves out some small classes to protect students’ privacy.
Each letter grade counts once. A− has its own bar. Subject averages cover the same subject, level, and term, including this class. How the averages are calculated.