Results 31 to 40 of about 9,924,069 (183)
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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Frontiers in Plant Science, 2019 Meiosis is a process of essential importance for sexual reproduction, as it leads to production of gametes. The recombination event (crossing-over) generates genetic variation by introducing new combination of alleles.
Miriam Szurman-Zubrzycka +5 more
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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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Genetic variability in soybean with resistance to cyst nematode and powdery mildew: impact of multi-parent crosses on recombination and genetic diversity [PDF]
Brazilian Journal of BiologyThe objective of this study was to analyze the genetic variability generated from two-way, four-way, and eight-way hybridizations in soybean, derived from parental lines contrasting in resistance to cyst nematode and powdery mildew.
F. R. S. Muniz +6 more
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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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Frontiers in Genetics, 2018 Repeats in coding and non-coding regions have increasingly been associated with many human genetic disorders, such as Richieri-Costa-Pereira syndrome (RCPS).
Gabriella S. P. Hsia +12 more
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Ecology and EvolutionA balanced lethal system is a genetic disease that results in the loss of half of the reproductive output. The best‐known balanced lethal system is found in newts of the genus Triturus. In these newts, two different versions of chromosome 1, named 1A and
Willem R. M. Meilink +7 more
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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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Birds crossing over roads: species, flight heights and infrastructure use
European Journal of Ecology, 2020 How high do birds fly above roads, and how do they use the road infrastructure (bridges, lampposts etc.)? These questions are rarely explored in ecological studies but were addressed by us during research in 2016–2018 in southern Poland.
Betleja Jacek +3 more
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A case study of newly tunnels over-crossing the existing subway tunnels
International Journal of Distributed Sensor Networks, 2022 Due to the continuous expansion of congested urban areas, many new tunnels are inevitable to over-cross the existing subway lines and may even affect the operation of existing lines.
Ben Wu +4 more
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