Unit 5: Heredity
Biology · Unit 5 · Paper 2

Heredity unit test

A test on this unit alone, marked as a percentage and a letter grade — for the test your class is actually sitting, rather than for May. Answer everything, then submit once: seeing the answer to question 3 before attempting question 4 makes the final percentage meaningless.

Paper 1Paper 2Paper 3
Each paper is built from this unit’s 28 terms and is the same for everyone, so a teacher can assign “Unit 5, Paper 2” and every student sits the identical test. Multiple choice is marked objectively; the written sections you mark yourself against the model answer and rubric.
Suggested time 31 min 28 points0/17 attempted
1

Pleiotropy

2

Nondisjunction

3

Wild type vs mutant

4

Monohybrid cross

5

Epistasis

6

Law of segregation

7

Barr body and X-inactivation

8

Carrier

9

Dihybrid cross

10

Sex-linked inheritance

11

Interpreting error bars

12

Mean, standard deviation, standard error

Short answer 1. Define or explain: Multiple alleles

3 pts

Short answer 2. Define or explain: Degrees of freedom in chi-square

3 pts

Short answer 3. Define or explain: Law of independent assortment

3 pts

Short answer 4. Define or explain: Punnett square and probability

3 pts

Free response

4 pts

This course has no free-response prompt tagged to this unit, so one from elsewhere in the course is used. It is still worth writing — the skill transfers.

An enzyme catalyses the breakdown of hydrogen peroxide. A student measures reaction rate at pH values from 3 to 11 and finds the rate peaks sharply at pH 7 and is nearly zero at pH 3 and pH 11.

Identify the independent variable and the dependent variable.

Explain why the reaction rate is near zero at pH 3.

Predict the effect on rate of adding more substrate at pH 7 while enzyme concentration is held constant, and justify your answer.