Origins of Sex: Three Billion Years of Genetic Recombination

Copertina anteriore
Yale University Press, 1 gen 1990 - 258 pagine
A fascinating and detailed examination of the evolution--and occasional devolution--of sexuality in microorganisms and more complex forms of life. Margulis and Sagan trace sex from its inauspicious beginnings in bacteria threatened by ultraviolet radiation to its intimate relation with the origin of mitotic division of nucleated cells. The origin of meiotic sex through cannibalism followed by centriole reproductive tardiness and the connection of cell symbiosis to sex and differentiation are explored.
"The authors have not only given us a new and exiting scenario for the evolution of sex, but have also provided us with critical ways in which we can test their hypotheses. . . . This is a stimulating book that is sure to invoke criticism and discussion; I strongly recommend it."--Symbiosis
"The book is well organized and well written, leading the reader from one thought to another almost effortlessly. Background information is presented to aid those of us who are not experts in this field, and a glossary is appended. The book could be used at all levels of study, from interested undergraduates in general biology though postdoctoral students of genetics and evolution. I recommend this thought-provoking book to you for both your enjoyment and your enlightenment."--Richard W. Cheney, Jr., Journal of College Science Teaching
"This book, undoubtedly controversial, is a thoughtful and original contribution to an important aspect of cellular biology."--John Langridge
 

Sommario

INTRODUCTION
1
WHAT IS LIFE?
9
WHAT IS EVOLUTION?
16
WHAT IS SEX?
25
THREATS TO DNA AND THE EMERGENCE OF SEXUALITY
38
RECOMBINATION AND BACTERIAL MATING
54
THE EMERGENCE OF PROTISTS
62
THE ORIGIN OF CHROMOSOMES
114
CANNIBALISM AND OTHER MERGERS
146
PAIRING AND HALVING
153
MEIOSIS AND CELL DIFFERENTIATION
170
BIG EGGS AND SMALL SPERM
183
THREE BILLION YEARS OF
204
Glossary
227
References
237
Index
249

CHROMOSOME DEPLOYMENT IN MITOSIS
124

Parole e frasi comuni

Informazioni sull'autore (1990)

Lynn Margulis was born in Chicago, Illinois on March 5, 1938. She graduated from the University of Chicago at the age of 18. She received a master's degree in genetics and zoology from the University of Wisconsin and a Ph.D. in genetics from the University of California, Berkeley. She taught for 22 years at Boston University before joining the faculty at the University of Massachusetts, Amherst in 1988. She was best known for her theory of species evolution by symbiogensis. The manuscript in which she first presented her findings was published in 1967 by the Journal of Theoretical Biology. An expanded version, with additional evidence to support the theory, became her first book entitled Origin of Eukaryotic Cells. Her other works include Symbiosis in Cell Evolution, Luminous Fish: Tales of Science and Love, Dazzle Gradually: Reflections on the Nature of Nature, and Mind, Life, and Universe: Conversations with Great Scientists of Our Time. She died five days after suffering a hemorrhagic stroke on November 22, 2011 at the age of 73.

Informazioni bibliografiche