Campbell Biology (12th Edition)

Published by Pearson
ISBN 10: 0135188741
ISBN 13: 978-0-13518-874-3

Chapter 23 - Test Your Understanding - Levels 3-4 - Applying/Analyzing - Page 505: 3

Answer

B.

Work Step by Step

A is wrong since there has to be at least one allele, and C and D are wrong since 0% variability means that there cannot be a second allele which by definition must be different for at least one nucleotide. Also, D is wrong because 0% nucleotide variability means that gene variability must be 0% as well-- genes are made of nucleotides.
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