ATARMAxxing · Biology
HSC Biology Practice Questions
64 exam-style questions · full worked solutions
The 64 practice questions inside the HSC Biology Mastery Pack, grouped by area of study. Every question comes with a full worked solution.
- Heredity
- Multiple choice × 12
- Calculate × 2
- Analyse × 1
- Evaluate × 1
- Genetic Change
- Multiple choice × 12
- Interpret × 1
- Describe × 1
- Explain × 1
- Evaluate × 1
- Infectious Disease
- Multiple choice × 12
- Distinguish × 1
- Explain × 1
- Analyse × 1
- Evaluate × 1
- Non-infectious Disease and Disorders
- Multiple choice × 12
- Calculate × 1
- Analyse × 1
- Explain × 1
- Evaluate × 1
Sample question
In a pea plant, a true-breeding tall plant (genotype TT) is crossed with a true-breeding short plant (genotype tt), where tall is completely dominant. The F1 plants are then self-pollinated to produce 600 F2 plants. Approximately how many of the F2 plants are expected to be short?
- A. 75
- B. 150
- C. 300
- D. 450
Show the worked answer
Answer: B
F1 are all Tt. Selfing Tt x Tt gives a 3:1 ratio, so short (tt) = 1/4. 1/4 x 600 = 150 short plants.
Included in the HSC Biology Mastery Pack
20 full-length practice exams with worked solutions, 20 revision notes, 64 practice questions and 200 flashcards.
Preview a sample note and question free on the HSC Biology hub →