Igenetics Study Guide

Test Bank to Accompany

iGenetics: A Molecular Approach
Third Edition by Russell / Bose
Benjamin Cummings

c.2010 3/10/09

Contents
Chapter 1 Chapter 2 Chapter 3 Chapter 4 Chapter 5 Chapter 6 Chapter 7 Chapter 8 Chapter 9 Chapter 10 Chapter 11 Chapter 12 Chapter 13 Chapter 14 Chapter 15 Chapter 16 Chapter 17 Chapter 18 Chapter 19 Chapter 20 Chapter 21 Chapter 22 Chapter 23 Genetics: An Introduction...............................................................................................1 DNA: The Genetic Material ............................................................................................9 DNA Replication............................................................................................................17
Answer: Genetic maps can be used in the process of localizing genes and studying the distribution of genes on chromosomes and in the genome.
Skill: Factual recall

40) What is recombination frequency? Answer: Recombination frequency is the percentage of recombinant progeny, that is, the percentage of the progeny in which the arrangement of alleles has switched compared to their arrangement in the parents. This is taken to be a measure of the genetic distance between genes and is used to create genetic maps.
Skill: Factual recall

41) Are genetic maps based on the actual distance on chromosomes as measured by nucleotides? Answer: No. Genetic maps are based on the frequency of recombination between genes. As such, they show relative distances between genes but cannot specify actual distance in terms of nucleotides.
Skill: Conceptual understanding

42) Which organelles besides the nucleus contain their own DNA? Answer: The mitochondria in eukaryotes and the chloroplasts in plants contain DNA of their own.
Skill: Factual recall

43) The nucleus separates the chromosomes from the rest of the cell. How is the information in the DNA communicated to the cell? Answer: The nuclear membrane has pores and is permeable to certain molecules. This allows selected materials, like RNA and proteins, to move in and out of the
What is the sequence of the complementary DNA strand? Answer: 3'-TGGACGATGCC-5'
Skill: Problem-solving

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Chapter 2 DNA: The Genetic Material 15

39) What is the function of dispersed repeated sequences such as SINEs and LINEs in eukaryotes? Answer: Little is known about the function of such sequences, but one hypothesis is that they have no function at all. Another is that they are involved in regulating gene expression.
Skill: Factual recall

40) What is the C-value paradox, and what is its cause? Answer: There is also no direct relationship between the C-value (the total amount of DNA in the haploid genome) and the structural or organizational complexity of the organism. This is due in part to the amount of repetitive-sequence DNA found in the genome of some organisms.
Skill: Conceptual understanding

41) Define Chargaffʹs rules of the base composition of DNA. Answer: Chargaffʹs rules include the following: (1) the amount of adenine = the amount of thymine, (2) the amount of guanine = the amount of cytosine, and (3) the amount of purines = the amount of pyrimidines.
Skill: Factual