Acknowledgments Many people contributed to the development and produc- tion of this edition.Kevin Witt,Senior Editor,and Michael Palumbo,Assistant Editor,initiated the project and provided As with previous editions,this edition of Principles of Genetics has ideas about some of the text's features.Dr.Pamela Marshall been influenced by the genetics courses we teach.We thank our of Arizona State University suggested many ways in which the students for their constructive feedback on both content and peda- previous edition could be improved,and a panel of genetics gogy,and we thank our colleagues at the University of Minnesota teachers thoughtfully commented on her suggestions.The for sharing their knowledge and expertise.Genetics professors panel's members were:Anna Aguano,Manhattan Marymount at other institutions also provided many helpful suggestions.In College;Robert Fowler,San Jose State University;Jane particular,we acknowledge the help of the following reviewers: Glazebrook,University of Minnesota;Shawn Kaeppler, University of Wisconsin;Todd Kelson,Brigham Young 6TH EDITION REVIEWERS University-Idaho;and Dwayne A.Wise,Mississippi State University.We are grateful for all the input from these experi- Ann Aguano,Manhattan Marymount College;Mary A.Bedell, enced teachers of genetics. University of Georgia;Jonathan Clark,Weber State University; Jennifer Dearden and Lauren Morris helped with many Robert Fowler,San Jose State University;Cheryl Hertz, of the logistical details in preparing this edition,and Lisa Loyola Marymount University;Shawn Kaeppler,University of Passmore researched and obtained many new photographs. Wisconsin;Todd Kelson,Brigham Young University-Idaho; Jennifer MacMillan,Senior Photo Editor,skillfully coordi- Richard D.Noyes,University of Central Arkansas;Maria E. nated the entire photo program.We are grateful for all their Orive,University of Kansas;Rongsun Pu,Kean University contributions.We thank Maureen Eide,Senior Designer,for creating a fresh text layout,and we thank Precision Graphics REVIEWERS OF PREVIOUS EDITIONS and Aptara for executing the illustrations.Elizabeth Swain, Senior Production Editor,superbly coordinated the production Michelle Boissere,Xavier University of Louisiana;Stephen P. of this edition,Betty Pessagno faithfully copyedited the manu- Bush,Coastal Carolina University;Sarah Crawford,Southern script,Lilian Brady did the final proofreading,and Stephen Connecticut State University;Xiongbin Lu,University of Ingle prepared the index.We deeply appreciate the excellent South Carolina-Columbia;Valery N.Soyfer,George Mason work of all these people.We also thank Clay Stone,Executive University;David Starkey,University of Central Arkansas; Marketing Manager,for helping to get this edition into the Frans Tax,University of Arizona;Tzvi Tzfira,University hands of prospective users.With an eye toward the next edi- of Michigan;Harald Vaessin,The Ohio State University- tion,we encourage students,teaching assistants,instructors, Columbus;Sarah Van Vickle-Chavez,Washington University and other readers to send us comments on this edition in care of in St.Louis;Willem Vermerris,University of Florida;Alan S Jennifer Dearden at John Wiley Sons,Inc.,111 River Street, Waldman,University of South Carolina-Columbia Hoboken,NJ,07030. viiiviii Acknowledgments As with previous editions, this edition of Principles of Genetics has been influenced by the genetics courses we teach. We thank our students for their constructive feedback on both content and peda￾gogy, and we thank our colleagues at the University of Minnesota for sharing their knowledge and expertise. Genetics professors at other institutions also provided many helpful suggestions. In particular, we acknowledge the help of the following reviewers: 6TH EDITION REVIEWERS Ann Aguano, Manhattan Marymount College; Mary A. Bedell, University of Georgia; Jonathan Clark, Weber State University; Robert Fowler, San Jose State University; Cheryl Hertz, Loyola Marymount University; Shawn Kaeppler, University of Wisconsin; Todd Kelson, Brigham Young University – Idaho; Richard D. Noyes, University of Central Arkansas; Maria E. Orive, University of Kansas; Rongsun Pu, Kean University REVIEWERS OF PREVIOUS EDITIONS Michelle Boissere, Xavier University of Louisiana; Stephen P. Bush, Coastal Carolina University; Sarah Crawford, Southern Connecticut State University; Xiongbin Lu, University of South Carolina – Columbia; Valery N. Soyfer, George Mason University; David Starkey, University of Central Arkansas; Frans Tax, University of Arizona; Tzvi Tzfira, University of Michigan; Harald Vaessin, The Ohio State University – Columbus; Sarah VanVickle-Chavez, Washington University in St. Louis; Willem Vermerris, University of Florida; Alan S. Waldman, University of South Carolina – Columbia Many people contributed to the development and produc￾tion of this edition. Kevin Witt, Senior Editor, and Michael Palumbo, Assistant Editor, initiated the project and provided ideas about some of the text’s features. Dr. Pamela Marshall of Arizona State University suggested many ways in which the previous edition could be improved, and a panel of genetics teachers thoughtfully commented on her suggestions. The panel’s members were: Anna Aguano, Manhattan Marymount College; Robert Fowler, San Jose State University; Jane Glazebrook, University of Minnesota; Shawn Kaeppler, University of Wisconsin; Todd Kelson, Brigham Young University – Idaho; and Dwayne A. Wise, Mississippi State University. We are grateful for all the input from these experi￾enced teachers of genetics. Jennifer Dearden and Lauren Morris helped with many of the logistical details in preparing this edition, and Lisa Passmore researched and obtained many new photographs. Jennifer MacMillan, Senior Photo Editor, skillfully coordi￾nated the entire photo program. We are grateful for all their contributions. We thank Maureen Eide, Senior Designer, for creating a fresh text layout, and we thank Precision Graphics and Aptara for executing the illustrations. Elizabeth Swain, Senior Production Editor, superbly coordinated the production of this edition, Betty Pessagno faithfully copyedited the manu￾script, Lilian Brady did the final proofreading, and Stephen Ingle prepared the index. We deeply appreciate the excellent work of all these people. We also thank Clay Stone, Executive Marketing Manager, for helping to get this edition into the hands of prospective users. With an eye toward the next edi￾tion, we encourage students, teaching assistants, instructors, and other readers to send us comments on this edition in care of Jennifer Dearden at John Wiley & Sons, Inc., 111 River Street, Hoboken, NJ, 07030