Dictionary » G » Genetic locus

Genetic locus

Definition

noun, plural: genetic loci

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


Supplement

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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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: 6277

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: 7749

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: 562
Views: 929030

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: 2111

Re: 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 ... if necessary. The point I make is this. The reality is that most genetic changes occur as a result of cellular processes in response to stress, ...

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by scottie
Sat Mar 03, 2012 5:23 pm
 
Forum: Evolution
Topic: Theories - Origin of Life
Replies: 562
Views: 929030
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