Unit 5: Heredity
Biology · Unit 5 · Paper 1

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 1” 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 36 min 33 points0/17 attempted
1

Law of independent assortment

2

Pedigree analysis

3

Nondisjunction

4

Genotype vs phenotype

5

Carrier

6

Multiple alleles

7

Cytoplasmic inheritance

8

Interpreting error bars

9

Dihybrid cross

10

Epistasis

11

Monohybrid cross

12

Polygenic inheritance

Short answer 1. Define or explain: Interpreting a chi-square result

3 pts

Short answer 2. Define or explain: Sex-linked inheritance

3 pts

Short answer 3. Define or explain: Wild type vs mutant

3 pts

Short answer 4. Define or explain: Mean, standard deviation, standard error

3 pts

Free response

9 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.

A student cuts identical cylinders from a single potato, blots and weighs each one, and places one cylinder in each of five sucrose solutions for 60 minutes at 22 °C. After blotting and reweighing, the percent change in mass is: 0.0 M, +12%; 0.2 M, +5%; 0.4 M, −3%; 0.6 M, −11%; 0.8 M, −18%.

Identify the independent and dependent variables, and describe one variable the student must hold constant.

Explain why percent change in mass is reported rather than absolute change in grams.

Using the data, estimate the sucrose molarity at which the potato tissue is isotonic to the bathing solution and justify your estimate.

Calculate the solute potential of the 0.4 M sucrose solution at 22 °C (295 K), using Ψs = −iCRT with i = 1 and R = 0.0831 L·bar·mol⁻¹·K⁻¹.

Predict and explain the direction of net water movement if a cylinder from the 0.4 M beaker were transferred to distilled water.