Results 31 to 40 of about 624,423 (312)

Redundancy and compensation in axon guidance: genetic analysis of the Drosophila Ptp10D/Ptp4E receptor tyrosine phosphatase subfamily [PDF]

open access: yes, 2008
Background: Drosophila has six receptor protein tyrosine phosphatases (RPTPs), five of which are expressed primarily in neurons. Mutations in all five affect axon guidance, either alone or in combination.
Bahri, Sami   +3 more
core   +4 more sources

Natural genetic transformation generates a population of merodiploids in Streptococcus pneumoniae. [PDF]

open access: yesPLoS Genetics, 2013
Partial duplication of genetic material is prevalent in eukaryotes and provides potential for evolution of new traits. Prokaryotes, which are generally haploid in nature, can evolve new genes by partial chromosome duplication, known as merodiploidy ...
Calum Johnston   +9 more
doaj   +1 more source

Assessment of the Degree of Relatedness of Some Inbred Lines Created at ARDS Turda

open access: yesAgronomy, 2023
Knowledge of relatedness among maize elite breeding genotypes is useful in planning crosses for hybrid and inbred line improvement and assigning them into heterotic groups.
Andrei Varga   +5 more
doaj   +1 more source

A Correlation of Cytological and Genetical Crossing-Over in Zea Mays [PDF]

open access: yesProceedings of the National Academy of Sciences, 1931
In this paper, McClintock and Creighton conclusively demonstrated the occurrence of genetic and cytological crossingover, a process assumed but not proven since 1910. In it they took two genetic markers and two cytological markers and demonstrated that when crossing-over occurred, they traveled together.
H B, Creighton, B, McClintock
openaire   +2 more sources

INDUCED MITOTIC CROSSING-OVER IN RELATION TO GENETIC REPLICATION IN SYNCHRONOUSLY DIVIDING CELLS OF USTILAGO MAYDIS.

open access: yesGenetical research, 1965
A method is now available for synchronizing the division of populations of cells of the smut fungus Ustilago maydis . In two experiments carried out with a diploid strain heterozygous for several biochemical markers, samples of cells were removed at ...
R. Holliday
semanticscholar   +1 more source

Effect of Cross Over Operator in Genetic Algorithms on Anticipatory Scheduling [PDF]

open access: yesProceedings of the International Symposium on Automation and Robotics in Construction (IAARC), 2007
Disk schedulers in current operating systems schedule a request as soon as the previous request has been completed. In many common applications disk read requests are issued synchronously with short period between them In this case, the scheduler switches to a request from another process with the assumption that the last process has no more requests ...
R. Muthu Selvi, R. Rajaram
openaire   +1 more source

Control of meiotic crossing over in plant breeding

open access: yesВавиловский журнал генетики и селекции, 2023
Meiotic crossing over is the main mechanism for constructing a new allelic composition of individual chromosomes and is necessary for the proper distribution of homologous chromosomes between gametes.
S. R. Strelnikova, R. A. Komakhin
doaj   +1 more source

Variable grouping in multivariate time series via correlation [PDF]

open access: yes, 2001
The decomposition of high-dimensional multivariate time series (MTS) into a number of low-dimensional MTS is a useful but challenging task because the number of possible dependencies between variables is likely to be huge.
Liu, X, Swift, S, Tucker, A
core   +1 more source

The unsung hero of science: Barbara McClintock, who won the Nobel Prize in Physiology or Medicine in 1983 for her discovery of mobile genetic elements [PDF]

open access: yesThe Ukrainian Biochemical Journal
In 1983, American plant biologist and cytogeneticist McClintock, one of the great loners of modern­ scien­ce, received the first woman scientist’s unshared Nobel Prize in Physiology or Medicine. Barbara McClintock’s research, conducted in the 1930s, long
O. P. Matyshevska   +2 more
doaj   +1 more source

Genetic Programming Crossover: Does It Cross over? [PDF]

open access: yes, 2009
One justification for the use of crossover operators in Genetic Programming is that the crossover of program syntax gives rise to the crossover of information at the semantic level. In particular, a fitness-increasing crossover is presumed to act by combining fitness-contributing components of both parents.
openaire   +1 more source

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