Age of sex-determining mechanisms in vertebrates.
Science, 1959/8/14;130(3372):372-5.
PMID: 13675759
Impact factor: 63.714
Abstract
Certain characteristic patterns of physiologic sex determination are not causally linked with types of genic and chromosomal constitution (XX-XY or ZW-ZZ). The observed widespread but not universal parallelism in the distribution of genetic and physiologic patterns among vertebrate groups expresses genealogic relationship. On the basis of this interpretation one may estimate the approximate evolutionary age of the mechanism of genetic sex determination. It is concluded that in all tetrapod vertebrates these mechanisms originated during the Jurassic period. Environmental conditions seem to affect the progress of this evolution.
Keywords: EVOLUTION; SEX CHARACTERISTICS
MeSH terms
Animals; Biological Evolution; Environment; Female; Male; Physiological Phenomena; Sex Characteristics; Sex Chromosomes; Sex Determination Processes; Sex Factors; Vertebrates
More resources
EndNote: Download