RecLOH is a term in genetics that is an abbreviation for "Recombinational Loss of Heterozygosity". Genetics (from Ancient Greek grc-Latn genetikos, “genitive” and that from grc-Latn genesis, “origin” a discipline of Biology, is Zygosity refers to the genetic condition of a Zygote. In genetics zygosity describes the similarity or dissimilarity of DNA between Homologous
This is a type of mutation which occurs with DNA by recombination. In biology mutations are changes to the Nucleotide sequence of the Genetic material of an organism Deoxyribonucleic acid ( DNA) is a Nucleic acid that contains the genetic instructions used in the development and functioning of all known From a pair of equivalent ("homologous"), but slightly different genes, a pair of identical genes results. In this case there is an unreciprocal exchange of genetic code between the chromosomes, in contrast to chromosomal crossover, because genetic information is lost.
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For Y chromosome
In genetic genealogy, the term is used particularly concerning similar seeming events in Y chromosome DNA. Genetic genealogy is the application of Genetics to traditional genealogy. The Y chromosome is the sex-determining Chromosome in most Mammals including Humans In mammals it contains the gene SRY, which triggers This type of mutation happens within one chromosome, and does not involve a reciprocal transfer. Rather, one homologous segment "writes over" the other. The mechanism is presumed to be different from RecLOH events in autosomal chromosomes, since the target is the very same chromosome instead of the homologous one. An autosome is a non-sex Chromosome. It is an ordinarily paired type of chromosome that is the same in both Sexes of a species.
During the mutation one of these copies overwrites the other. Thus the differences between the two are lost. Because differences are lost, heterozygosity is lost. Zygosity refers to the genetic condition of a Zygote. In genetics zygosity describes the similarity or dissimilarity of DNA between Homologous
Recombination on the Y chromosome does not only take place during meiosis, but virtually at every mitosis when the Y chromosome condenses, because it doesn't require pairing between chromosomes. The Y chromosome is the sex-determining Chromosome in most Mammals including Humans In mammals it contains the gene SRY, which triggers In Biology or life science meiosis (pronounced my-oh-sis is a process of reductional division in which the number of chromosomes per cell is cut in half Mitosis is the process in which a Eukaryotic cell separates the Chromosomes in its Cell nucleus, into two identical sets in two daughter nuclei Recombination frequency even exceeds the frame shift mutation frequency (slipped strand mispairing) of (average fast) Y-STRs, however many recombination products may lead to infertile germ cells and "daughter out". Mutation process which occurs during DNA replication. It involves denaturation and displacement of the DNA strands resulting in mispairing of the complementary bases A Y-STR is a Short tandem repeat (STR on the Y chromosome. Y-STRs are often designated by DYS numbers.
Recombination events (RecLOH) can be observed if YSTR databases are searched for twin alleles at 3 or more duplicated markers on the same palindrome (hairpin). Stem-loop intramolecular Base pairing is a pattern that can occur in single-stranded DNA or more commonly in RNA. E. g. DYS459, DYS464 and DYS724 (CDY) are located on the same palindrome P1. The following list of DYS (DNA Y-chromosome Segment markers are commonly used in Genealogical DNA testing DYS454 is the least diverse and multi-copy A high proportion of 9-9, 15-15-17-17, 36-36 combinations and similar twin allelic patterns will be found. PCR typing technologies have been developed (e. g. DYS464X) that are able to verify that there are most frequently really two alleles of each, so we can be sure that there is no gene deletion. The following list of DYS (DNA Y-chromosome Segment markers are commonly used in Genealogical DNA testing DYS454 is the least diverse and multi-copy In Genetics, a deletion (also called gene deletion, deficiency, or deletion mutation) is a Mutation (a genetic aberration Family genealogies have proven many times, that parallel changes on all markers located on the same palindrome are frequently observed and the result of those changes are always twin alleles. So a 9-10, 15-16-17-17, 36-38 haplotype can change in one recombination event to the one mentioned above, because all three markers (DYS459, DYS464 and DYS724) are affected by one and the same recLOH event. The following list of DYS (DNA Y-chromosome Segment markers are commonly used in Genealogical DNA testing DYS454 is the least diverse and multi-copy
References
- Krahn, Thomas (2005). Recombinational Loss of Heterozygosity (recLOH). DNA-Fingerprint, Germany. Retrieved on 2006-07-11. Year 2006 ( MMVI) was a Common year starting on Sunday of the Gregorian calendar. Events 911 - Signing of the Treaty of Saint-Clair-sur-Epte between Charles the Simple and Rollo of Normandy.
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A null allele is a mutant copy of a gene that completely lacks that gene's normal function In genetics, paternal mtDNA transmission and paternal mtDNA inheritance refer to the incidence of paternal Mitochondrial DNA (mtDNA being passed on This is a list of genetic genealogy topics. Important concepts Genetic genealogy Genealogical DNA testDapyx Software network: MP3 Explorer | Ebook Manager | Zenithic