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Tajima's D is a population genetic test statistic created by and named after the Japanese researcher Fumio Tajima. [1] Tajima's D is computed as the difference between two measures of genetic diversity: the mean number of pairwise differences and the number of segregating sites, each scaled so that they are expected to be the same in a neutrally evolving population of constant size.
Comparing the value of the Watterson's estimator, to nucleotide diversity is the basis of Tajima's D which allows inference of the evolutionary regime of a given locus.
Fumio Tajima was born in Ōkawa, in Japan's Fukuoka prefecture, in 1951. [1] [2] He graduated from high school in 1970, completed his undergraduate degree at Kyushu University in 1976, and received a Master's degree from the same institution in 1978. [3]
Fay and Wu's H is a statistical test created by and named after two researchers Justin Fay and Chung-I Wu. [1] The purpose of the test is to distinguish between a DNA sequence evolving randomly ("neutrally") and one evolving under positive selection.
Tajima's D is based on the expectation that S = theta * x where x is the sum of 1/i for i from 1 to N. Thus, we turn this into a method to estimate theta by noting that theta = E(S)/x. The current version suggests that S/x part is a "normalized" version of segregating sites, and this leads to a mistake in the calculation of D in the example.
David Dobkin (born 23 June 1969) [2] [1] is an American director, producer and screenwriter. He is best known for directing the films Clay Pigeons , Shanghai Knights , Wedding Crashers , The Judge , and Eurovision Song Contest: The Story of Fire Saga .
David & David (stylized as David + David) was an American rock duo composed of Los Angeles–based studio musicians David Baerwald and David Ricketts. They are best known for their debut single "Welcome to the Boomtown" from the album Boomtown. [1] The single reached #37 on the Billboard Hot 100 in 1986 and #8 on the Billboard Top Rock Tracks ...
A Thousand Miles Behind is an album by English singer-songwriter David Gray. Released in August 2007, it contains twelve live covers recorded between 2001 and 2007. [1] The album title comes from a line in Bob Dylan's song "One Too Many Mornings" (1964). The compilation is only available from Gray's official website or at Gray's live performances.