BIO 181- Practice Exam 4

1. A cell is observed to have 4 chromosomes. What is the possible number of combinations

of chromosomes this cell can have?

a. 4

b. 8

c. 16

d. 20

e. 24

2. Before meiosis happens, the cell must undergo:

a. G1

b. S

c. G2

d. All of the above

3. Fertilization refers to:

a. The process of 2 gametes fusing

b. What is created after 2 gametes fuse

c. The process of an embryo growing

d. The formation of gametes

4. Hemophilia is an X-linked recessive disease. If an unaffected, carrier mother has a child

with an affected father, what is the chance that a son will have hemophilia?

a. 0%

b. 25%

c. 50%

d. 75%

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e. 100%

5. When a ball is at the top of a hill, not in motion, the ball has energy.

a. Conserved

b. Potential

c. Kinetic

d. Thermal

6. Which of the following refers to Mendel’s Law of Independent Assortment?

a. Chromosomes line up independently of maternal or paternal copy

b. Only one allele exists in each gene

c. Alleles of different genes on different chromosomes are inherited independently

of each other

d. An offspring with a dominant allele will always exhibit the dominant trait

7. Which of the following is in the correct order of the life cycle?

a. Meiosis -> fertilization -> gamete -> mitosis -> zygote

b. Zygote -> meiosis -> gamete -> mitosis -> fertilization

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c. Mitosis -> meiosis -> gamete -> zygote -> fertilization

d. Meiosis-> gamete -> fertilization -> zygote -> mitosis

8. What correctly describes the difference between homologous chromosomes and sister

chromatids?

a. Homologous chromosomes contain genetic information from the same parent,

while sister chromatids are the same gene but from different parents

b. Homologous chromosomes are diploid, sister chromatids are haploid when

separated

c. Homologous chromosomes contain the same genes but each is from a different

parent, sister chromatids are identical copies of the same gene

d. Homologous chromosomes are the whole chromosomes from different parents,

sister chromatids is what is produced when homologous chromosomes are

separated after meiosis I

9. Which of these is an example of kinetic energy?

a. A rollercoaster reaching the top of a hill and is about to coast down

b. A baseball being caught by a catchers mitt

c. A car picking up speed when driving down to Phoenix

d. A picture frame hanging on the wall

10. Klinefelter syndrome is when an individual has the genotype XXY. What can you infer

about this?

a. This disorder is Sex-Linked

b. There was nondisjunction

c. This is an example of monosomy

d. 2 of the above

e. All of the above

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