Dictionary » G » Genetic locus

Genetic locus


noun, plural: genetic loci

The location of a gene (or of a significant sequence) on a chromosome or on a linkage map.


For example, the locus of the gene OCA1 (or Oculocutaneous Albinism Type 1, the gene associated with albinism) is on 11q1.4-a2.1, which means it is on the long arm of chromosome 11, between sub-band 4 of band 1 to sub-band 1 of band 2.

Word origin: locus » Latin stlocus, a place.

Also called: gene locus.
See also: allele.

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I have got some BIG issues! forgive the long post

... by the functional alleles (A and B alleles) of a single gene at the ABO locus, catalyze the last step of the synthesis, while the protein coded by ... acceptor substrate, (H antigen) remains without a further modification. GENETIC PATHWAY OF THE ABO SYSTEM The term secretor, as used in blood banking, ...

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by saddy51
Sun Jan 04, 2015 10:39 am
Forum: Genetics
Topic: I have got some BIG issues! forgive the long post
Replies: 1
Views: 1906

cell specific markers

Do such genetic markers exist? Markers that are present in one population (at least to a certain ... high frequency difference is a polymorphism at the human melanocortin 1 receptor locus (MC1R), an enzyme involved in skin color formation. In a study by Rana et al. (1999) ...

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by MarkHolland
Sat Mar 30, 2013 3:16 pm
Forum: Cell Biology
Topic: cell specific markers
Replies: 3
Views: 8449

How dominance works at the DNA/RNA/protein

... both of which are *identical*. An individual chromosome contains genetic material from *one* parent. ... No. Chromatids are present ONLY during ... are Green. So, green is dominant. At that point it’s called a trait locus. Than you do a lot of research and discover that this locus corresponds ...

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by Cat
Fri Oct 05, 2012 1:15 am
Forum: Genetics
Topic: How dominance works at the DNA/RNA/protein
Replies: 10
Views: 9849

Theories - Origin of Life

... data suggest that many are nonrandom, cell type-, cell stage- and locus-specific events. Recent studies have revealed novel cellular mechanisms ... The reality is that most genetic changes occur as a result of cellular processes in response to stress, ...

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by AstraSequi
Tue Mar 27, 2012 2:25 am
Forum: Evolution
Topic: Theories - Origin of Life
Replies: 563
Views: 1135170

Re: What is Second-Order Selection?

... population affects the mutation rate. This can be done by postulating a locus that affects the mutation rate of other genes. This locus might, for ... loci are the most useful devices for understanding the evolution of genetic systems. Source: Futuyma, D.J. (1998). Evolutionary Biology , 3rd ...

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by Luxorien
Sat Mar 03, 2012 8:12 pm
Forum: Evolution
Topic: What is Second-Order Selection?
Replies: 1
Views: 2645
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