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单词 Subclades
释义

Subclades

英语百科

Haplogroup

  Ancestral Haplogroup   Haplogroup A (Hg A)  Haplogroup B (Hg B) All of these molecules are part of the ancestral haplogroup, but at some point in the past a mutation occurred in the ancestral molecule, mutation A, which produced a new lineage; this is haplogroup A and is defined by mutation A. At some more recent point in the past, a new mutation, mutation B, occurred in a person carrying haplogroup A; mutation B defined haplogroup B. Haplogroup B is a subgroup, or subclade of haplogroup A; both haplogroups A and B are subclades of the ancestral haplogroup.
Dominant Y-chromosome haplogroups in pre-colonial world populations, with possible migrations routes according to the Coastal Migration Model.
Human migrations and mitochondrial haplogroups.PNG
Map of human haplotype migration, according to mitochondrial DNA, with Key (coloured) indicating periods in numbered thousands of years before the present.

A haplogroup (from the Greek:ἁπλούς, haploûs, "onefold, single, simple" and English:group), is a combination of alleles at different chromosomes regions that are closely linked and that tend to be inherited together. It is a group of individual organisms which, in terms of molecular evolution, share a common ancestor – a genetic line of descent demonstrated by a particular single nucleotide polymorphism (SNP) mutation. Because a haplogroup consists of similar haplotypes, it is usually possible to predict a haplogroup from haplotypes.

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更新时间:2025/6/20 7:35:10