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Linkage map

Definition

noun

A genetic map showing the relative positions of genetic markers along a chromosome that is determined by the recombination frequency during crossover of homologous chromosomes.


Supplement

Genetic linkage map shows the relative positions of genetic markers on a chromosome. The positions of genetic markers are determined based on how often the loci are inherited together rather than on the specific physical distance between them. It means that the more often the two genetic markers are inherited together the farther apart they are. In contrast, the lower frequency of being inherited together the smaller the physical distance is between them.


Synonym: genetic map.
See also: genetic locus.


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Re: maping and linkage problems

Genetic linkage occurs when particular genetic loci or alleles for genes are inherited jointly. Genetic loci on the same chromosome are physically connected and tend to stay together during meiosis, and are thus genetically linked. ...

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by teachncljul09
Wed Aug 19, 2009 11:49 am
 
Forum: Genetics
Topic: maping and linkage problems
Replies: 4
Views: 168

maping and linkage problems

if the E. coli genome is 4 X 106 bp, answer the following questions.? 1.If the E. coli genome is 4 X 106 bp, answer the following questions. a. If this circular molecule was made linear, how long would it be in cm? b. In a single E. coli cell, what is the weight (in μgrams) of this DNA? c. If you ex...

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by hemu0912
Sun Jul 26, 2009 5:59 pm
 
Forum: Genetics
Topic: maping and linkage problems
Replies: 4
Views: 168

Determinig linkage map and parental genotype

... between male and female, it proves that these alleles are sex-linkage. And the ratio of males proves that three alleles (and other in my ... region 2 (between b and c) crossovers are 7.1%. Therefore, the region1 map distance is : 5.8 + 0.3=6.1 cM. The region 2 map distance is: 7.1 + 0.3 ...

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by littlemonkey
Sat Jul 18, 2009 5:04 pm
 
Forum: Genetics
Topic: Determinig linkage map and parental genotype
Replies: 2
Views: 199

Genetics Problems... Friends i need ur help

... on the underlying genotype giving rise to the observed phenotype: - type of transmission (i.e. recessive/dominant or codominance) - gene linkage (i.e. are they on the same chromosome or not) and calculate the distribution of phenotype in each case (just like above, draw punnet squares ...

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by canalon
Thu Jul 16, 2009 2:03 am
 
Forum: Genetics
Topic: Genetics Problems... Friends i need ur help
Replies: 5
Views: 236

Determinig linkage map and parental genotype

... Explain the results. Show the genotypes of the parents, and construct a linkage map showing the correct order and distance of the loci.

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by sportboy4life13
Fri Jul 03, 2009 7:36 pm
 
Forum: Genetics
Topic: Determinig linkage map and parental genotype
Replies: 2
Views: 199
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