Maternal Lineage
Mostrando 13-24 de 47 artigos, teses e dissertações.
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13. Mitochondrial DNA polymorphism in a maternal lineage of Holstein cows
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14. Mitochondrial DNA polymorphism in a maternal lineage of Holstein cows.
Two mitochondrial genotypes are shown to exist within one Holstein cow maternal lineage. They were detected by the appearance of an extra Hae III recognition site in one genotype. The nucleotide sequence of this region has been determined and the genotypes are distinguished by an adenine/guanine base transition which creates the new Hae III site. This point
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15. Rare maternal mRNAs code for regulatory proteins that control lineage-specific gene expression in the sea urchin embryo
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16. Age at onset in Huntington's disease: effect of line of inheritance and patient's sex.
The Leiden Roster for Huntington's disease (HD) contained data on 2617 cases up to July 1988. The age at onset (AO) was known in 1084 cases and in 1020 of these both their AO and the sex of the affected parent was known. The mean AO was higher for females than for males and higher for maternal than for paternal cases. However, in the group born before 1925 o
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17. Reprogramming of early embryonic blastomeres into endodermal progenitors by a Caenorhabditis elegans GATA factor
The END-1 GATA factor has been implicated in specifying endoderm in Caenorhabditis elegans and is the earliest known zygotic protein expressed in the lineage of E, the clonal endoderm progenitor. We report that ubiquitous end-1 expression during a critical period in embryogenesis causes all non-endodermal lineages to produce endoderm instead of ectoderm and/
Cold Spring Harbor Laboratory Press.
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18. Phylogeny of rice genomes with emphasis on origins of allotetraploid species
The rice genus, Oryza, which comprises 23 species and 9 recognized genome types, represents an enormous gene pool for genetic improvement of rice cultivars. Clarification of phylogenetic relationships of rice genomes is critical for effective utilization of the wild rice germ plasm. By generating and comparing two nuclear gene (Adh1 and Adh2) trees and a chl
The National Academy of Sciences.
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19. Discordance of nuclear and mitochondrial DNA phylogenies in Hawaiian Drosophila.
Drosophila differens, endemic to Molokai, Drosophila planitibia of Maui, and Drosophila silvestris and Drosophila heteroneura from the island of Hawaii are chromosomally homosequential species that presumably have colonized the newer islands of the Hawaiian archipelago by sequential founder events. We have examined the phylogenetic relationships of these fou
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20. Is there an adverse effect of sons on maternal longevity?
Recent years have witnessed the emergence of a literature examining the effects of giving birth to sons on postmenopausal longevity in pre-industrial mothers. The original paper in this lineage used a sample (n=375) of Sami mothers from northern Finland and found that, relative to daughters, giving birth to sons substantially reduced maternal longevity. We e
The Royal Society.
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21. Multipotent cell lineages in early mouse development depend on SOX2 function
Each cell lineage specified in the preimplantation mammalian embryo depends on intrinsic factors for its development, but there is also mutual interdependence between them. OCT4 is required for the ICM/epiblast lineage, and at transient high levels for extraembryonic endoderm, but also indirectly through its role in regulating Fgf4 expression, for the establ
Cold Spring Harbor Laboratory Press.
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22. Multiple maternal origins and weak phylogeographic structure in domestic goats
Domestic animals have played a key role in human history. Despite their importance, however, the origins of most domestic species remain poorly understood. We assessed the phylogenetic history and population structure of domestic goats by sequencing a hypervariable segment (481 bp) of the mtDNA control region from 406 goats representing 88 breeds distri
The National Academy of Sciences.
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23. Rare maternal mRNAs code for regulatory proteins that control lineage-specific gene expression in the sea urchin embryo.
The prevalence of mRNAs coding for the sea urchin embryo regulatory factors P3A1 and P3A2 was measured by single-strand probe excess solution hybridization. P3A1 and P3A2 are not homologous proteins, though they both bind specifically to a particular cis-regulatory sequence. Interaction at this target site is known to be required for lineage-specific express
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24. An ancient clonal lineage in the fish genus Poeciliopsis (Atheriniformes: Poeciliidae).
Genetic diversity in mtDNA was assessed within the unisexual (all female) hybridogenetic fish Poeciliopsis monacha-occidentalis and the two sexual species from which it arose. Results confirm that P. monacha was the maternal ancestor and that paternal leakage of P. occidentalis mtDNA has not occurred. Of particular interest is the high level of de novo mutat