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Locus (genetics)

Index Locus (genetics)

A locus (plural loci) in genetics is a fixed position on a chromosome, like the position of a gene or a marker (genetic marker). [1]

25 relations: Allele, Centromere, Centrosome, Chromosomal translocation, Chromosome, Chromosome 3, Cytogenetic notation, G banding, Gene, Gene map, Gene mapping, Genetic marker, Genetics, Genome, International System for Human Cytogenetic Nomenclature, Karyotype, Microscope, National Cancer Institute, Null allele, Oculocutaneous albinism type I, Phenotypic trait, Ploidy, Polyploid, Telomere, Zygosity.


An allele is a variant form of a given gene.

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The centromere is the specialized DNA sequence of a chromosome that links a pair of sister chromatids (a dyad).

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In cell biology, the centrosome (Latin centrum 'center' + Greek sōma 'body') is an organelle that serves as the main microtubule organizing center (MTOC) of the animal cell as well as a regulator of cell-cycle progression.

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Chromosomal translocation

In genetics, a chromosome translocation is a chromosome abnormality caused by rearrangement of parts between nonhomologous chromosomes.

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A chromosome (from Ancient Greek: χρωμόσωμα, chromosoma, chroma means colour, soma means body) is a DNA molecule with part or all of the genetic material (genome) of an organism.

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Chromosome 3

Chromosome 3 is one of the 23 pairs of chromosomes in humans.

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Cytogenetic notation

The following table summarizes symbols and abbreviations used in cytogenetics.

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G banding

G-banding, G banding, or Giemsa banding is a technique used in cytogenetics to produce a visible karyotype by staining condensed chromosomes.

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In biology, a gene is a sequence of DNA or RNA that codes for a molecule that has a function.

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Gene map

Gene maps help describe the spatial arrangement of genes on a chromosome.

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Gene mapping

Gene mapping describes the methods used to identify the locus of a gene and the distances between genes.

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Genetic marker

A genetic marker is a gene or DNA sequence with a known location on a chromosome that can be used to identify individuals or species.

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Genetics is the study of genes, genetic variation, and heredity in living organisms.

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In the fields of molecular biology and genetics, a genome is the genetic material of an organism.

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International System for Human Cytogenetic Nomenclature

The International System for Human Cytogenetic Nomenclature (ISCN) is an international standard for human chromosome nomenclature, which includes band names, symbols and abbreviated terms used in the description of human chromosome and chromosome abnormalities.

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A karyotype is the number and appearance of chromosomes in the nucleus of a eukaryotic cell.

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A microscope (from the μικρός, mikrós, "small" and σκοπεῖν, skopeîn, "to look" or "see") is an instrument used to see objects that are too small to be seen by the naked eye.

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National Cancer Institute

The National Cancer Institute (NCI) is part of the National Institutes of Health (NIH), which is one of eleven agencies that are part of the U.S. Department of Health and Human Services.

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Null allele

A null allele is a nonfunctional copy of a gene caused by a genetic mutation.

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Oculocutaneous albinism type I

Oculocutaneous albinism type I or type 1A (OCA1A or OCAIA) is an autosomal recessive skin disease.

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Phenotypic trait

A phenotypic trait, or simply trait, is a distinct variant of a phenotypic characteristic of an organism; it may be either inherited or determined environmentally, but typically occurs as a combination of the two.

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Ploidy is the number of complete sets of chromosomes in a cell, and hence the number of possible alleles for autosomal and pseudoautosomal genes.

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Polyploid cells and organisms are those containing more than two paired (homologous) sets of chromosomes.

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A telomere is a region of repetitive nucleotide sequences at each end of a chromosome, which protects the end of the chromosome from deterioration or from fusion with neighboring chromosomes.

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Zygosity is the degree of similarity of the alleles for a trait in an organism.

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Redirects here:

(p) arm, Centisome, Chromosome nomenclature, Cytogenetic localization, Gene location, Gene locus, Genetic loci, Genetic locus, P arm, Pter (locus), Q arm, Qter, Short Arm, Short arm, Short-Arm.


[1] https://en.wikipedia.org/wiki/Locus_(genetics)

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