Dictionary » M » Marker



noun, plural: markers

(general) Anything that marks or is used to mark, e.g. a location.

(genetics) A gene or DNA sequence with known physical location, and whose pattern of inheritance can be followed.


In genetics, markers act as chromosomal landmarks. They are used to trace or identify specific region of a gene (especially one that is associated with an inherited disease) on a chromosome. They are also used to determine a linkage group or a recombination event.

Also called: (genetics) genetic marker, marker gene, DNA marker.
See also: genetic map.

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plasmid extraction on 1.5% agarose gel

So I have two bands, the smaller that is around 8-9kb based on the marker ( my plasmids should be 8-9 kb), what is the upper band? Also I have three plasmids and I did this in a set of four replicates

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by cah2010
Wed Dec 18, 2013 2:23 am
Forum: Molecular Biology
Topic: plasmid extraction on 1.5% agarose gel
Replies: 5
Views: 819

Need an help about Drosophila genetics

... there are two copies just like in humans: 2nd chromosome: UAS-UPRT is homozygous 3rd Chromosome: One chromosomes carries Repo. The other carries a marker TM6 which gives flies short bristles. You are starting from: 2nd chromosomes UAS-UPRT homozygous ; 3rd chromosomes wild-type homozygous crossed ...

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by golgicik
Wed Oct 30, 2013 8:46 pm
Forum: Genetics
Topic: Need an help about Drosophila genetics
Replies: 5
Views: 1329

Re: How

multiple gene insertion by conventional transformation is very time consuming and required selectable marker genes :( . So I have to do different..................? Do you have any idea ????? :(

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by Helics
Tue Oct 29, 2013 8:52 am
Forum: Molecular Biology
Topic: How
Replies: 4
Views: 909

HIS3-MX6 selective marker in S.cerevisiae

... (like a specific way to transform yeasts with plasmids containing HIS3-MX). I try to transform an integrating PCR fragment that contains HIS3-MX6 marker but I don't recover any transformants on -HIS drop-out plates. (I do not have any problems for my other transformations). thanks for your help.

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by cathbr
Fri Jul 05, 2013 6:51 pm
Forum: Molecular Biology
Topic: HIS3-MX6 selective marker in S.cerevisiae
Replies: 0
Views: 468

Calculating genetic distance

So the question is, A mutant in the Columbia ecotype of Arabidopsis, pass1, was mapped relative to marker A. For homozygous F2 pass1 plants from a Columbia © x Landsberg (L) cross the results for marker A were 60 CC, 10 CL, and 4 LL. Calculate the genetic distance (cM) between ...

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by SailorNorway
Sun Jun 30, 2013 11:36 am
Forum: Genetics
Topic: Calculating genetic distance
Replies: 0
Views: 483
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