Locus

The word locus (plural loci) is Latin for "place". It may refer to:

Positions

  • Locus of control, in industrial psychology, having an internal or external locus of control
  • Locus (genetics), the position of a gene (or other significant sequence) on a chromosome
  • Locus (mathematics), the set of points satisfying a particular condition, often forming a curve
  • Root locus, a diagram visualizing the position of roots as a parameter changes
  • Locus (medicine), the "place" on the body where a pathogen enters

    • Acronyms

  • Law & Order: Criminal Intent, a television series

    • Periodicals

  • Locus (magazine), a monthly trade journal devoted to the science fiction and fantasy publishing industry
    • Locus Award, presented to the winners of Locus magazine's annual readers' poll
  • Locus Award, presented to the winners of Locus magazine's annual readers' poll

    • Other uses

  • Loci (band), an alt-rock band from Bristol, United Kingdom
  • Locus (archaeology), the smallest definable unit in stratigraphy
  • The method of loci, a mnemonic system based on places
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    This page contains text from Wikipedia, the Free Encyclopedia - https://wn.com/Locus

    Locus (genetics)

    A locus (plural loci), in genetics, is the specific location or position of a gene, DNA sequence, on a chromosome. Each chromosome carries many genes; humans' estimated 'haploid' protein coding genes are 20,000-25,000, on the 23 different chromosomes. A variant of the similar DNA sequence located at a given locus is called an allele. The ordered list of loci known for a particular genome is called a gene map. Gene mapping is the process of determining the locus for a particular biological trait.

    Diploid and polyploid cells whose chromosomes have the same allele of a given gene at some locus are called homozygous with respect to that gene, while those that have different alleles of a given gene at a locus, are called heterozygous with respect to that gene.

    Nomenclature

    The chromosomal locus of a gene might be written "6p21.3". Because "21" refers to "region 2, band 1" this is read as "two one", not as "twenty-one". So the entire locus is "six P two one point three."

    A range of loci is specified in a similar way. For example, the locus of gene OCA1 may be written "11q1.4-q2.1", meaning it is on the long arm of chromosome 11, somewhere in the range from sub-band 4 of region 1 to sub-band 1 of region 2.

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    This page contains text from Wikipedia, the Free Encyclopedia - https://wn.com/Locus_(genetics)

    Transmission (medicine)

    In medicine and biology, transmission is the passing of a communicable disease from an infected host individual or group to a particular individual or group, regardless of whether the other individual was previously infected.

    The term usually refers to the transmission of microorganisms directly from one individual to another by one or more of the following means:

  • droplet contact – coughing or sneezing on another individual
  • direct physical contact – touching an infected individual, including sexual contact
  • indirect physical contact – usually by touching soil contamination or a contaminated surface (fomite)
  • airborne transmission – if the microorganism can remain in the air for long periods
  • fecal-oral transmission – usually from unwashed hands, contaminated food or water sources due to lack of sanitation and hygiene, an important transmission route in pediatrics, veterinary medicine and developing countries.

    • Transmission can also be indirect, via another organism, either a vector (e.g. a mosquito or fly) or an intermediate host (e.g. tapeworm in pigs can be transmitted to humans who ingest improperly cooked pork). Indirect transmission could involve zoonoses or, more typically, larger pathogens like macroparasites with more complex life cycles.

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    This page contains text from Wikipedia, the Free Encyclopedia - https://wn.com/Transmission_(medicine)

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