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ClonalityThe Genetics, Ecology, and Evolution of Sexual Abstinence in Vertebrate Animals$
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John C. Avise

Print publication date: 2008

Print ISBN-13: 9780195369670

Published to Oxford Scholarship Online: January 2009

DOI: 10.1093/acprof:oso/9780195369670.001.0001

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Clonality within the Individual

Clonality within the Individual

Chapter:
(p.3) CHAPTER ONE Clonality within the Individual
Source:
Clonality
Author(s):

John C. Avise

Publisher:
Oxford University Press
DOI:10.1093/acprof:oso/9780195369670.003.0001

Although clonality is often discussed in reference to whole organisms, the phenomenon also applies to (and is underlain by) genetic processes operating within each individual. All forms of clonal reproduction begin with the faithful replication of genetic material. This chapter discusses the clonal propagation of nucleic acids (via DNA replication) and of entire nuclear genomes and chromosome sets (via mitosis) in populations of somatic cells. It also describes how mitochondrial genomes, as well as particular kinds of sex chromosomes, provide special examples of genetic systems that abstain from recombination. The net result of such micro-asexual processes is a multicellular individual, which can thus be viewed as a tightly knit colony of clonemate cells.

Keywords:   DNA replication, mitosis, somatic cells, mitochondrial genome, sex chromosomes, recombination, multicellular

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