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Theoretical and experimental evidences support the hypothesis that the genomes and the epigenomes may be different in the somatic cells of complex organisms. In the genome, the differences range from single base substitutions to chromosome number; in the epigenome, they entail multiple postsynthetic modifications of the chromatin. Somatic genome variations(More)
We tested the hypothesis that a large age difference between parents can shift the sex ratio at birth in favor of males, as Manning et al. (1997) suggested in their analysis of English and Welsh data. Among children born in Lombardy (northern Italy) in 1990 and 1991, we observed an anomalous excess of males born to a particular subsample of parents with a(More)
The aim of this study was to establish the importance of genetic, biological and environmental factors which may affect sex ratio at birth in dairy cattle. Four main kinds of variations may be considered: heterogeneity between the mothers with respect to the probability of a male birth, variation in this probability according to parity within the progenies;(More)
Simple tandem repeats represent more than 1% of the human genome: occasionally they exhibit intergenerational expansibility and are associated with neuromuscular diseases. In transgenic mice the same sequences elicit similar symptoms, but do not expand. We have searched for di-, tri-, and tetra-repeats in the published DNA sequences of chromosomes 21 and 22(More)
Fusarium head blight (FHB) is a serious disease affecting barley in Brazil, especially for causing a signifi cant impact to the malt industry due to mycotoxin contamination. Current information concerning the genetic diversity of Brazilian F. graminearum populations is limited to isolates obtained from wheat. Attempting to characterize the B-trichothecene(More)
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