Jump to ContentJump to Main Navigation
Mitonuclear Ecology$
Users without a subscription are not able to see the full content.

Geoffrey E. Hill

Print publication date: 2019

Print ISBN-13: 9780198818250

Published to Oxford Scholarship Online: June 2019

DOI: 10.1093/oso/9780198818250.001.0001

Show Summary Details
Page of

PRINTED FROM OXFORD SCHOLARSHIP ONLINE (oxford.universitypressscholarship.com). (c) Copyright Oxford University Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in OSO for personal use. date: 20 October 2021

The evolution of sex and two sexes

The evolution of sex and two sexes

(p.96) 5 The evolution of sex and two sexes
Mitonuclear Ecology

Geoffrey E. Hill

Oxford University Press

Sexual reproduction has proven so formidable a challenge for evolutionary biologists that it is commonly spoken of as “the paradox of sex.” Stated simply, individuals forsake one-half of their genetic representation in offspring by engaging in sexual versus asexual reproduction. There must be substantial benefits to compensate for so great a cost. Recent theory proposes that the primary benefit of sex is the tremendous diversity of genotypes produced via recombination during sexual reproduction that provides the raw material necessary to compensate for mutational erosion of mitochondrial genes. Another line of new thinking proposes that the reason that virtually all eukaryotes have two mating types rather than multiple mating types is that the existence of two mating types enables single mitochondrial genotypes to be vetted for compatibility with nuclear genotype. This chapter considers the implications and evidence for these new mitonuclear-based theories of key evolutionary ideas.

Keywords:   Recombination, paradox of sex, mutational meltdown, anisogamy, uniparental inheritance, obligate asexuality

Oxford Scholarship Online requires a subscription or purchase to access the full text of books within the service. Public users can however freely search the site and view the abstracts and keywords for each book and chapter.

Please, subscribe or login to access full text content.

If you think you should have access to this title, please contact your librarian.

To troubleshoot, please check our FAQs , and if you can't find the answer there, please contact us .