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undergraduate thesis
Određivanje spola kod morskih kornjača pod utjecajem temperature
Zagreb: University of Zagreb, Faculty of Science, 2010. urn:nbn:hr:217:629425
Marinković, Mija
University of Zagreb
Faculty of Science
Department of Biology

Institutional repository: Repository of the Faculty of Science

Cite this document

Marinković, M. (2010). Određivanje spola kod morskih kornjača pod utjecajem temperature (Undergraduate thesis). Zagreb: University of Zagreb, Faculty of Science. Retrieved from https://urn.nsk.hr/urn:nbn:hr:217:629425

Marinković, Mija. "Određivanje spola kod morskih kornjača pod utjecajem temperature." Undergraduate thesis, University of Zagreb, Faculty of Science, 2010. https://urn.nsk.hr/urn:nbn:hr:217:629425

Marinković, Mija. "Određivanje spola kod morskih kornjača pod utjecajem temperature." Undergraduate thesis, University of Zagreb, Faculty of Science, 2010. https://urn.nsk.hr/urn:nbn:hr:217:629425

Marinković, M. (2010). 'Određivanje spola kod morskih kornjača pod utjecajem temperature', Undergraduate thesis, University of Zagreb, Faculty of Science, accessed 29 November 2024, https://urn.nsk.hr/urn:nbn:hr:217:629425

Marinković M. Određivanje spola kod morskih kornjača pod utjecajem temperature [Undergraduate thesis]. Zagreb: University of Zagreb, Faculty of Science; 2010 [cited 2024 November 29] Available at: https://urn.nsk.hr/urn:nbn:hr:217:629425

M. Marinković, "Određivanje spola kod morskih kornjača pod utjecajem temperature", Undergraduate thesis, University of Zagreb, Faculty of Science, Zagreb, 2010. Available at: https://urn.nsk.hr/urn:nbn:hr:217:629425

Metadata
TitleOdređivanje spola kod morskih kornjača pod utjecajem temperature
Title (english)Temperature dependent sex determination in sea turtles
AuthorMija Marinković
MentorGordana Lacković-Venturin (mentor)
GranterUniversity of Zagreb
Faculty of Science
(Department of Biology)
Zagreb
Defense date and country2010, Croatia
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Biology
Abstract
Na određivanje spola djeluju i genetički i okolišni faktori. Kod mnogih gmazova, tip gonada je determiniran inkubacijskom temperaturom jaja i taj je proces poznat kao temperaturna determinacija spola (TSD). Gmazovi sa TSD pokazuju različite odnose između temperature i omjera spolova. Niže temperature produciraju ženke, a više mužjake kod mnogih guštera i krokodila, dok je kod većine kornjača situacija obrnuta. Estrogen ima važnu ulogu u spolnoj determinaciji kod gmazova sa TSD. Neki geni uključeni u determinaciju spola kod sisavaca su ustanovljeni i u gonadama drugih kralježnjaka. Sox9, Dax1 i Dmrt1 su eksprimirani na početku razvoja gonada kod ptica i gmazova. Danas još uvijek ne znamo točno kako temperatura djeluje na spol embrija, ali se zna da važnu ulogu u tome ima estrogen. Neki toksični spojevi kao što su poliklorirani bifenili (PCBs) mogu imati djelovanje slično estrogenu i uzrokovati reproduktivne anomalije. Ovo je očiti dokaz da utjecaj čovjeka može biti štetan za okoliš i organizme u njemu.
Abstract (english)
Sex determination is controlled either by genetic or environmental factors. In many reptiles, gonadal sex is determined by the incubation temperature of the egg, a process known as temperature-dependent sex determination (TSD). Reptiles with TSD exhibit various relationships between temperature and sex ratio. Low temperatures produce females and high temperatures produce males in many lizards and crocodilians, whereas this pattern is reversed in most turtles. Estrogen playes a significant role in sex determination in reptiles with TSD. Some genes of the mammalian sex-determining pathway have been identified in gonads of different vertebrates. Sox9, Dax1 and Dmrt1 are expressed at the onset of gonadal development in birds and reptiles. Today we are still unclear as to how temperature ultimately effects the sex of the embryo, but the argument for the role of estrogen appears even stronger. Some of the effects of toxicants such as polychlorinated biphenyls (PCBs) can have estrogenic effects and can induce reproductive anomalies. There is abundant evidence that manmade products can become environmental toxicants.
Keywords
Keywords (english)
Languagecroatian
URN:NBNurn:nbn:hr:217:629425
Study programmeTitle: Molecular Biology
Study programme type: university
Study level: undergraduate
Academic / professional title: sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) molekularne biologije (sveučilišni/a prvostupnik/prvostupnica (baccalaureus/baccalaurea) molekularne biologije)
Type of resourceText
File originBorn digital
Access conditionsOpen access
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Created on2018-03-28 09:22:06