Results 31 to 40 of about 9,924,168 (281)
Plick Graphs with Crossing Number 1 [PDF]
, 2011 In this paper, we deduce a necessary and sufficient condition for graphs whose plick graphs have crossing number 1. We also obtain a necessary and sufficient condition for plick graphs to have crossing number 1 in terms of forbidden ...
Basavanagoud, B., Kulli, V.R.
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Levels of Heterochiasmy During Arabidopsis Development as Reported by Fluorescent Tagged Lines
G3: Genes, Genomes, Genetics, 2020 Crossing over, the exchange of DNA between the chromosomes during meiosis, contributes significantly to genetic variation. The rate of crossovers (CO) varies depending upon the taxon, population, age, external conditions, and also, sometimes, between the
Ramswaroop Saini +3 more
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Mechanism of Crossing-over [PDF]
Nature, 1946 A NUMBER of theories have emerged from time to time attempting to visualize the exact mechanism involved during crossing-over, which is now known to be the sole agent conditioning the formation of the cytologically visible chiasma. Among these the one proposed by Darlington1 based on torsions is the most elaborate, in the sense that it offers an ...
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The mechanics of crossing-over [PDF]
Proceedings of the Royal Society of London. Series B - Biological Sciences, 1949 Abstract A theoretical treatment of the frequency distribution of chiasmata along a chromosome is developed, based on Darlington’s postulate of relating crossing-over to chromosome coiling. Each chromatid is assumed to be an elastic thread subject to torsion and longitudinal stress, which is liable to break (but not yield) at a ...
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Pediatric Blood &Cancer, EarlyView.ABSTRACT Pediatric gastroenteropancreatic neuroendocrine neoplasms (GEP‐NENs) are extremely rare and clinically heterogeneous. Management has largely been extrapolated from adult practice. This European Standard Clinical Practice Guideline (ESCP), developed by the EXPeRT network in collaboration with adult NEN experts, provides (adult) evidence ...
Michaela Kuhlen +23 more
wiley +1 more source
G3: Genes, Genomes, Genetics, 2016 Balancer chromosomes are multiply inverted chromosomes that suppress meiotic crossing over and prevent the recovery of crossover products. Balancers are commonly used in Drosophila melanogaster to maintain deleterious alleles and in stock construction ...
Danny E. Miller +3 more
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Solid Pseudopapillary Neoplasm of the Pancreas in Children and Adolescents: Expert Recommendations
Pediatric Blood &Cancer, EarlyView.ABSTRACT Solid pseudopapillary neoplasm of the pancreas (SPN) is a rare low‐grade malignant exocrine pancreatic tumor, mostly discovered during the second decade of life in females, with a very good prognosis, provided microscopically complete surgical excision is achieved.
Sabine Irtan +18 more
wiley +1 more source
Animal use of fence crossings in southwestern rangelands
Ecology and Evolution, 2022 Net‐wire fencing built to confine livestock is common on rangelands in the Southwestern USA, yet the impacts of livestock fencing on wildlife are largely unknown.
Lisa D. Zoromski +6 more
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Pediatric Blood &Cancer, EarlyView.ABSTRACT Background Loneliness is associated with adverse physical and mental health outcomes and remains understudied in children and adolescents undergoing cancer therapy. Pediatric oncology patients may be at increased risk due to medical isolation and disruption of social networks.
Charlotte N. Stahlfeld +5 more
wiley +1 more source
Crossing Over: Rauschenberg, Kafka, and the Boundaries of Imagination
Aesthetic Investigations, 2016 How do we make sense of something we don’t recognize? This topic raises an important background question: how do we recognize or come to imaginatively experience the subject that a work of art or fiction presents to us?
Erik Wolfgang Schmidt
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