Monographs on Endocrinology

Sex Chromosomes and Sex-Linked Genes

Authors: Ohno, Susumu

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About this book

Natural selection operates among individual organisms which differ in their genetic constitution. The degree of hereditary variability within a species is greatly enhanced by cross-fertilization. Indeed, the mechanism of sexual reproduction occurred very early in evolution, for it is seen today even in bacteria. In Escherichia coli, fertilization occurs by passage of the single chromosome from the male into the female bacterium (LEDERBERG, 1959). In multicellular organisms, the separation of germ from soma, and the production of haploid gametes became mandatory. The gametes were of two types. One, extremely mobile, was designed to seek out and penetrate the other, which loaded with nutrients, received the mobile gamete and intiated the development of a new individual. The foundation for true bisexuality was thus laid. In the primitive state of bisexuality, whether an individual is to be a sperm-producing male or an egg-producing female appears to be decided rather haphazardly. In the worm, Banelia viridis, the minute males are parasites in the female. Larvae that become attached to the proboscis of an adult female become males, while unattached larvae sink to the bottom and become females (BALTZER, 1935). The more sophisticated state of bisexuality was initiated by setting aside a particular pair of chromosomes for specialization and making either the male or the female a heterogametic sex. Sex chromosomes as we know them were thus born.

Table of contents (15 chapters)

Table of contents (15 chapters)
  • Introduction

    Ohno, Dr. Susumu

    Pages 1-4

  • Evidence Indicating that the X and the Y or the Z and the W were Originally an Homologous Pair of Ordinary Chromosomes

    Ohno, Dr. Susumu

    Pages 5-13

  • Differentiation of the Primitive Sex Elements at the Expense of the Y or W, and the Conservation of the Original X or Z

    Ohno, Dr. Susumu

    Pages 13-24

  • Polyphyletic Evolution of Vertebrates

    Ohno, Dr. Susumu

    Pages 24-46

  • Conservation of the Original X and Homology of the X-linked Genes in Placental Mammals

    Ohno, Dr. Susumu

    Pages 46-73

Buy this book

eBook $84.99
price for USA in USD (gross)
  • ISBN 978-3-642-88178-7
  • Digitally watermarked, DRM-free
  • Included format: PDF
  • ebooks can be used on all reading devices
  • Immediate eBook download after purchase
Softcover $139.99
price for USA in USD
  • ISBN 978-3-642-88180-0
  • Free shipping for individuals worldwide
  • Usually dispatched within 3 to 5 business days.
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Bibliographic Information

Bibliographic Information
Book Title
Sex Chromosomes and Sex-Linked Genes
Authors
Series Title
Monographs on Endocrinology
Series Volume
1
Copyright
1966
Publisher
Springer-Verlag Berlin Heidelberg
Copyright Holder
Springer-Verlag Berlin ยท Heidelberg
eBook ISBN
978-3-642-88178-7
DOI
10.1007/978-3-642-88178-7
Softcover ISBN
978-3-642-88180-0
Series ISSN
0077-1015
Edition Number
1
Number of Pages
X, 192
Number of Illustrations
68 b/w illustrations
Topics