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Titolo:
THE TESTIS - THE WITNESS OF THE MATING SYSTEM, THE SITE OF MUTATION AND THE ENGINE OF DESIRE
Autore:
SHORT RV;
Indirizzi:
ROYAL HOSP WOMEN,DEPT PERINATAL MED,132 GRATTAN ST CARLTON VIC 3053 AUSTRALIA
Titolo Testata:
Acta paediatrica
, volume: 86, anno: 1997, supplemento:, 422
pagine: 3 - 7
SICI:
0803-5253(1997)86:<3:TT-TWO>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
HEMOPHILIA-B; GREAT-APES; BODY-SIZE; PATTERN; RATIO;
Keywords:
GAMETE SELECTION; MATING SYSTEM; MUTATION RATE; SEXUAL BEHAVIOR; TESTICULAR DESCENT; TESTIS SIZE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
26
Recensione:
Indirizzi per estratti:
Citazione:
R.V. Short, "THE TESTIS - THE WITNESS OF THE MATING SYSTEM, THE SITE OF MUTATION AND THE ENGINE OF DESIRE", Acta paediatrica, 86, 1997, pp. 3-7

Abstract

There is now abundant evidence in a wide range of mammalian and non-mammalian species to show that the relative size of the testis and the morphology of the spermatozoa are infallible predictors of the mating system. Species with the largest testis/body weight ratios and the best spermatozoa have a multi-male or promiscuous mating system in which sperm competition operates. Judged by these criteria, men were not designed to be promiscuous. There is increasing evidence in humans to show that most spontaneous mutations of the germ line occur in the testis. Because these provide the variability on which natural selection canoperate, the testis holds the key to evolution. Genes on the Y chromosome that control male fertility are particularly prone to mutations, perhaps because of the mutagenic metabolites produced by the metabolically active testis. Testicular descent into a scrotum, and cooling by countercurrent heat exchange between the spermatic artery and vein mayhave evolved as a way of holding the mutation rate in check. The hormones secreted by the testis, which control libido and aggression, ensure that these male mutations are disseminated as widely as possible throughout the population.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/12/20 alle ore 00:25:26