Practice Chapter 13
Name___________________________________
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1) What is a genome?
A) the complete complement of an organism's genes
B) a specific sequence of polypeptides within each cell
C) an arrangement of our chromosomes from largest to smallest
D) a specialized polymer of four different kinds of monomers
E) a specific segment of DNA that is found within a prokaryotic chromosome
2) If the liver cells of an animal have 24 chromosomes, its sperm cells would have how many chromosomes?
A) 12
B) 6
C) 48
D) 24
3) Which of the following is true of a species that has a chromosome number of 2n = 16?
A) The species is diploid with 32 chromosomes.
B) A gamete from this species has 8 chromosomes.
C) During the S phase of the cell cycle there will be 32 separate chromosomes.
D) The species has 16 sets of chromosomes.
E) There are 16 homologous pairs.
4) Which of the following is the term for a human cell that contains 22 pairs of autosomes and two X
chromosomes?
A) a female somatic cell
B) a sperm cell
C) an unfertilized egg cell
D) a male somatic cell
E) Both A and D are correct.
5) In animals, meiosis results in gametes, and fertilization results in
A) sporophytes.
B) zygotes.
C) clones.
D) somatic cells.
6) In animals, somatic cells result from mitosis and __________ result from meiosis.
A) spores
B) clones
C) gametes
D) diploid cells
7) Recombinant chromosomes are the result of
A) environmental factors such as radiation and carcinogenic chemicals.
B) separation of homologous chromosomes in metaphase I of meiosis.
C) mutations.
D) crossing-over.
E) incorrect pairings of DNA nucleotides.
8) Which of the following is true of the process of meiosis?
A) Four haploid cells result.
B) Four autosomes result.
C) Four diploid cells result.
D) Four chiasmata result.
E) Two diploid cells result.
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E) spores.
E) zygotes
Refer to the drawings in Figure 13.2 of a single pair of homologous chromosomes as they might appear during various stages of
either mitosis or meiosis and answer the following questions.
Figure 13.2
9) Which diagram represents late prophase I of meiosis?
A) I
B) II
C) III
10) Which drawing represents anaphase of mitosis?
A) II
B) III
C) IV
D) IV
E) V
D) V
E) VI
11) You are genetically unique. This is at least in part a result of
A) random fertilization.
B) independent assortment of chromosomes.
C) genetic recombination.
D) both A and C.
E) A, B, and C.
SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.
Use the following key to answer the following questions. Each answer may be used once, more than once, or not at all.
A.
B.
C.
D.
E.
The statement is true for mitosis only.
The statement is true for meiosis I only.
The statement is true for meiosis II only.
The statement is true for mitosis and meiosis I.
The statement is true for mitosis and meiosis II.
12) This occurs when a cell divides to form two nuclei that are genetically identical.
13) Independent assortment of chromosomes occurs.
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Answer Key
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