Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 10 of 10 for “"Heterochrony"”.
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Inference of ecology from the ontogeny of microfossils
… in age at maturity are correlated with heterochrony as expected; accelerated maturity should yield generalized morphology and small size, while delayed maturity should produce specialized morphology and large size. Two of the four species show the expected pattern, the other two do not. …
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Towards a Performative Migratory Aesthetics in Work by Womxn-Identifying Practitioners in the United States, 1970–2018
… the migratory conditions of movement, memory, heterochrony, and contact double as ritualized strategies of performance, serving to construct liminal identities in 1970s works by Theresa Hak Kyung Cha, Ana Mendieta, and Adrian Piper, which then persist and transform throughout the 1980s–2010s in …
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Changes in morphology during the development of the horn and hump of the Chinese cavefish sinocyclocheillus furcodorsalis
… other features refuted the hypothesis that heterochrony underlies hump and horn development in S. furcodorsalis.
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The Functional Roles of the Lin28/let-7 Axis in Tissue Regeneration and Cancer
… role in controlling developmental timing, or heterochrony. Subsequent studies have further uncovered many additional cellular processes, such as differentiation, metabolism, and body size, controlled by Lin28 and let-7. Their role in pathology, however, is not as well characterized. Although …
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Variation in neural crest development contributes to phenotypic diversification of East African cichlid fishes
… duration, and rate of developmental events (heterochrony) concomitant with NC development. Interspecific differences were also identified at the onset of overt formation of craniofacial skeleton and body pigmentation, irrespective of the developmental heterochronies. Second, I characterise …
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Evolution and Development of Pigmentation Patterns in East African Cichlid fishes
… suggests that early timing of cellular events (heterochrony) significantly contributes to adult phenotypic outcomes. I identified candidate genes contributing to egg-spot patterning using transcriptomic and genomic mapping techniques. Despite the genetic similarity between species and ecomorphs, …
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THE EVOLUTIONARY DEVELOPMENT OF CROWN GALLOANSERAE SKULLS: TRACKING CHANGES IN GALLIFORM AND ANSERIFORM CRANIAL DEVELOPMENT
… galliforms. Subsequently, I examined the role of heterochrony in the production of cranial disparity between Galliformes and Anseriformes. I found that allometric trajectories of both clades overlap in rate and direction, but anseriform ontogeny is longer and has an earlier onset relative to …
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Old World Serpents and New World Dragons: The Evolutionary Dynamics of Pythons and Liolaemid Lizards
… body shape from juveniles to adults. I find that heterochrony (a dissociation of size, shape and age) is the initial developmental process responsible for pythons to diverge in morphology. Although this process involves shifting the rate and timing of development, it still requires that the …
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Old World Serpents and New World Dragons: The Evolutionary Dynamics of Pythons and Liolaemid Lizards
… body shape from juveniles to adults. I find that heterochrony (a dissociation of size, shape and age) is the initial developmental process responsible for pythons to diverge in morphology. Although this process involves shifting the rate and timing of development, it still requires that the …
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Role of KNOX genes in the evolution and development of floral nectar spurs
A key question in biology is how changes in gene function or regulation produce new morphologies during evolution. The nectar spur is an evolutionarily labile structure known to influence speciation in a broad range of angiosperm taxa. Here, the genetic basis of nectar spur development, and the …