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Logo of the Y Chromosome Haplotype Reference Database (YHRD) version 4.0. The Y Chromosome Haplotype Reference Database (YHRD) is an open-access, annotated collection of population samples typed for Y chromosomal sequence variants. [1]
Y-chromosome Database: The Y chromosome is passed on from father to son with little changes to Y-DNA. Surnames also tend to generally be passed on from father to son. The Sorenson Database used Y-chromosome genetic markers and surnames to determine common ancestors. Users could share DNA results and pedigree charts obtained from other sources ...
The Y chromosome is one of two sex chromosomes in therian mammals and other organisms.Along with the X chromosome, it is part of the XY sex-determination system, in which the Y is the sex-determining chromosome because the presence of the Y chromosome causes offspring produced in sexual reproduction to be of male sex.
Scientists fully sequence the Y chromosome for the first time, uncovering information that could have implications for the study of male infertility and other issues.
Search. Appearance. Donate; ... The category contains articles about human Y-chromosome haplogroups ... Y. Y Chromosome Haplotype Reference Database
The Y chromosome has been studied intensely and variations have been divided into Human Y-chromosome DNA haplogroups, based upon the results of the number of alleles in certain positions called markers. These "markers" have been chosen for their demonstrated ability to predict the haplogroup of the tested individual.
In human genetics, a human Y-chromosome DNA haplogroup is a haplogroup defined by specific mutations in the non-recombining portions of DNA on the male-specific Y chromosome (Y-DNA). Individuals within a haplogroup share similar numbers of short tandem repeats (STRs) and single-nucleotide polymorphisms (SNPs). [ 2 ]
E-Z827, also known as E1b1b1b, [4] is a major human Y-chromosome DNA haplogroup.It is the parent lineage to the E-Z830 and E-V257 subclades, and defines their common phylogeny.