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AP Bio

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Unit 5

5.7 Multiple Choice Questions

4 min read•december 10, 2021

AP Biology 🧬

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Multiple Choice Practice for Heredity

Welcome to Unit 5 AP Biology Multiple Choice Questions! Grab some paper and a pencil 📄 to record your answers as you go. You can see how you did on the Unit 5 Practice Questions Answers and Review sheet once you're done. Don't worry, we have tons of resources available if you get stumped 😕 on a question. And if solo study is not your thing, join a group in Hours!

Not ready to take a quiz yet? Take a look at the Intro to Unit 5.

Image courtesy of Pixabay

Facts about the test: The AP Biology exam has 60 multiple choice questions and you will be given 1 hour 30 minutes to complete the section. That means it should take you around 15 minutes to complete 10 questions.

The following questions were not written by College Board and although they cover information outlined in the AP Biology Course and Exam Description the formatting on the exam may be different.

1. Meiosis: Mitosis

A. creates 2 sets of diploid cells: creates 1 set of diploid cells

B. creates 2 haploid cells: creates 2 diploid cells

C. Creates 4 haploid cells: creates 2 diploid cells

D. creates 4 diploid cells: creates 4 haploid cells

2. During Prophase I in meiosis,

A. homologous chromosomes pair up and exchange genetic information

B. sister chromatids pair up and exchange genetic information

C. chromosomes unwind to their chromatin form

D. the nuclear envelope reappears

3. Independent assortment occurs during Metaphase I where homologous chromosomes line up independently along the metaphase plate. What does this accomplish?

A. Ensures genetic recombination between homologous chromosomes

B. Ensures daughters cells remain identical to the parent cell

C. Organizes the maternal and paternal chromosomes on separate poles

D. Increases genetic variation in the daughter cells

4. Why must Meiosis have two divisions? Choose the BEST answer:

A. After duplicating DNA, it must be split in half so that the original chromosome set remains the same

B. to create gametes (sex cells) that contain only one set of chromosomes

C. The DNA of the parent cell must equal the daughter cell

D. Meiosis must create unique daughter cells.

5. Metaphase I: Metaphase II

A. homologous chromosomes align: sister chromatids align

B. homologous chromosomes cross over: sister chromatids cross over

C. sister chromatids align: homologous chromosomes align

D. sister chromatids condense: homologous chromosomes condense

6. In a classic Mendelian cross, two heterozygous parents should yield a phenotypic ratio of:

A. 1:2

B. 1:3

C. 3:1

D. 4:0

7. In a cross of AaBb x AaBb, calculate probability of aabb offspring using probability rules.

A. 1/16

B. 1/4

C. 1/2

D. 9:3:3:1

8. Genotype: Phenotype

A. inherited: mutated

B. impacted by environment: not impacted by environment

C. physical expression of trait: allele combination

D. allele combination: physical expression of trait

9. Human blood type AB exhibits a pattern of inheritance called codominance. Explain why:

A. A and B alleles become a blend

B. A and B become recessive when present together

C. A and B cannot express with the O allele

D. Both A and B alleles are dominant

10. If you need to perform a "testcross" which would you include?

A. one homozygous dominant parent, one homozygous parent

B. an "unknown" parent and recessive parent

C. two heterozygous parents

D. two recessive parents

11. In a trait that displays sex-linked recessive inheritance, a male offspring with the trait received the affected trait from:

A. his mother

B. his father

C. mitochondrial DNA of the mother

D. too little information to answer

12. Select the true statement regarding genetic linkage maps (or recombination maps):

A. direct measure of the exact physical location of genes on a chromosome

B. show cross-over frequency of sex chromosomes

C. based on recombination frequencies

D. cannot show whether or not gene linkage exits

13. During Anaphase II of Meiosis, a spindle fiber breaks. Describe the outcome:

A. 1 daughter cell with an extra chromosome, 1 daughter cell missing a chromosome

B. 2 normal daughter cells, 2 daughter cells with missing chromosomes

C. 2 normal daughter cells, 2 daughter cells with extra chromosomes

D. 4 daughter cells with an extra chromosome

14. Traits W, X and Z are found on the same chromosome. Recombination frequencies: W and Z = 7%, W and X = 22%m, Z and X: 15%. Find the order of genes on the chromosome:

A. W-X-Z

B. W-Z-X

C. recombination frequencies are used to find linkage, not gene order

D. crossover frequencies under 50% do not show gene linkage

15. Female aphids can grow wings if their environment is too crowded (to fly away): this is an example of:

A. phenotypic plasticity

B. genotypic plasticity

C. epigenetics

D. natural selection