Sex Determination in Reptiles

@article{Bull1980SexDI,
  title={Sex Determination in Reptiles},
  author={James J. Bull},
  journal={The Quarterly Review of Biology},
  year={1980},
  volume={55},
  pages={3 - 21}
}
  • J. Bull
  • Published 1980
  • Biology
  • The Quarterly Review of Biology
Two factors in reptile sex determination have been studied: (1) the presence or absence of heteromorphic sex chromosomes, and (2) the influence of temperature. Recognizable sex chromosomes are common in snakes and lizards, but are apparently rare in turtles and absent in crocodilians and the tuatara. Temperature-dependent sex determination (TSD) is common in turtles and has been reported in two lizards and alligators; however, data on TSD are available for few non-turtle species. Present… Expand
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698 Citations
Highly Influential Citations
40
Background Citations
267
Methods Citations
11
Results Citations
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698 Citations

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Citation Type

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The general background and recent advancements for TSD research in reptiles is discussed and factors triggering the intrinsic genetic cascade, which leads either to development of a testis or ovary are discussed. Expand
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This chapter discusses the concept of temperature dependent sex determination (TSD), the predominant sex determining mechanism in turtles; the only documented occurrence of sex chromosomes is one of male heterogamety in the mud turtle, family Kinosternidae. Expand
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Sex-determining mechanisms in reptiles can be divided into two convenient classifications: genotypic (GSD) and environmental (ESD). While a number of types of GSD have been identified in a wide… Expand
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It is suggested that reptiles are predisposed to evolving TSD from genotypic sex determination (GSD) by virtue of the uniquely variable thermal environment experienced by their embryos during the critical period in which sex is determined. Expand
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It is suggested that lizard sex determination may be much more the result of an interplay between sex chromosomes and temperature than previously thought, such that the sex determination mode is influenced by the nature of heterogamety as well as temperature sensitivity and the stage of sex chromosome degeneration. Expand
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