|
Genetics And Archeogenetics Of South Asia
Genetics and archaeogenetics of South Asia is the study of the genetics and archaeogenetics of the ethnic groups of South Asia. It aims at uncovering these groups' genetic history. The geographic position of South Asia makes its biodiversity important for the study of the early dispersal of anatomically modern humans across Asia. Based on Mitochondrial DNA (mtDNA) variations, genetic unity across various South Asian sub–populations have shown that most of the ancestral nodes of the phylogenetic tree of all the mtDNA types originated in South Asia. Conclusions of studies based on Y Chromosome variation and Autosomal DNA variation have been varied. South Asians are descendants of an indigenous South Asian component (termed ''Ancient Ancestral South Indians'', short "AASI"), closest to modern isolated tribal groups from South India, as well as Andamanese peoples, and more distantly related to Aboriginal Australians and East Asians and later-arriving West-Eurasian (European/Middle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genetics
Genetics is the study of genes, genetic variation, and heredity in organisms.Hartl D, Jones E (2005) It is an important branch in biology because heredity is vital to organisms' evolution. Gregor Mendel, a Moravian Augustinian friar working in the 19th century in Brno, was the first to study genetics scientifically. Mendel studied "trait inheritance", patterns in the way traits are handed down from parents to offspring over time. He observed that organisms (pea plants) inherit traits by way of discrete "units of inheritance". This term, still used today, is a somewhat ambiguous definition of what is referred to as a gene. Trait inheritance and molecular inheritance mechanisms of genes are still primary principles of genetics in the 21st century, but modern genetics has expanded to study the function and behavior of genes. Gene structure and function, variation, and distribution are studied within the context of the cell, the organism (e.g. dominance), and within the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
