locus

(noun)

a fixed position on a chromosome that may be occupied by one or more genes

Related Terms

Examples of locus in the following topics:

  • Epistasis

    • A mouse with a recessive c allele at this locus is unable to produce pigment and is albino regardless of the allele present at locus A.
    • A gene at a separate locus (C) is responsible for pigment production.
    • The recessive c allele does not produce pigmentnand a mouse with the homozygous recessive cc genotype is albino regardless of the allele present at the A locus.

  • Epinephrine and Norepinephrine

    • It is also a neurotransmitter in the central nervous system and sympathetic nervous system, where it is released from noradrenergic neurons in the locus coeruleus.

  • Genetic Variation

    • Genetic variations are the differences in DNA segments or genes between individuals and each variation of a gene is called an allele.For example, a population with many different alleles at a single chromosome locus has a high amount of genetic variation.

  • Mendel's Law of Segregation

    • The behavior of homologous chromosomes during meiosis can account for the segregation of the alleles at each genetic locus to different gametes.

  • Genomic DNA and Chromosomes

    • Homologous chromosomes are the same length and have specific nucleotide segments called genes in exactly the same location, or locus.