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Dictionary » L » Locus

Locus

Definition

noun, plural: loci

(general) A place, space or locality, especially a centre of an activity.

(mathematics) The set of all points whose coordinates satisfy a given equation or condition.

(genetics) The location of a gene (or of a significant sequence) on a chromosome, as in genetic locus.

(medicine) The site on the body where a pathogen enters.


Supplement

Word origin: Latin stlocus, a place.

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Evolution Homework

If a recessive lethal allele has a frequency of 0.050 in newly formed zygotes in one generation, and the locus is in Hardy-Weinberg equilibrium, what will be the allele frequency and the genotype frequencies at this locus at the beginning of the next generation? Answer: q=0.048; ...

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by kdeponte
Tue Oct 04, 2011 4:30 am
 
Forum: Evolution
Topic: Evolution Homework
Replies: 2
Views: 69

Re: no repeat sequences in exons of genes?

... a mRNA back into DNA and cause diseases Dude, its sooo much more likely that the mRNA so retrotransposed would lead to the creation of an extra locus for the gene of interest.....remember its very unlikely to hit a piece of protein coding DNA, due to the fact that introns are way way way bigger ...

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by merv
Mon Oct 03, 2011 1:37 am
 
Forum: Genetics
Topic: no repeat sequences in exons of genes?
Replies: 5
Views: 330

Need help please

The ABO blood type is controlled by a single locus, called I, with alleles IA, IB, and IO. These give rise to the blood type phenotypes, A, B, AB, and O. a. Suppose that parents know their phenotypes: the father is type AB and the mother is type ...

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by kaivivi
Sat Sep 17, 2011 1:11 am
 
Forum: Genetics
Topic: Need help please
Replies: 2
Views: 177

Can someone help me please?

... as B-positive or AB-negative and so forth. The positive and negative part of the blood type is determined by a completely separate gene (the Rh locus). The ABO locus and the Rh locus are inherited independently, like pea shape and pea color. The positive phenotype is dominant to the negative ...

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by kaivivi
Sat Sep 17, 2011 1:07 am
 
Forum: Genetics
Topic: Can someone help me please?
Replies: 2
Views: 192

Re: Theories - Origin of Life

... engineering processes by cellular control networks to particular regions of the genome enhances the probability of generating useful new multi-locus systems. (Exactly how far the computational capacity of cells can influence complex genome rearrangements needs to be investigated. This area ...

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by scottie
Mon May 23, 2011 8:28 pm
 
Forum: Evolution
Topic: Theories - Origin of Life
Replies: 265
Views: 28591
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