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Chromosome 15 spans about 99.7 million base pairs (the building material of DNA) and represents between 3% and 3.5% of the total DNA in cells. Chromosome 15 is an acrocentric chromosome, with a very small short arm (the "p" arm, for "petite"), which contains few protein coding genes among its 19 million base pairs.
Most people have two copies of chromosome 21, while those with three copies of chromosome 21 (trisomy 21) have Down syndrome. Researchers working on the Human Genome Project announced in May 2000 that they had determined the sequence of base pairs that make up this chromosome. [ 5 ]
Three Hours After Marriage was a restoration comedy, written in 1717 as a collaboration between John Gay, Alexander Pope and John Arbuthnot, though Gay was the principal author. [1] The play is best described as a satirical farce, and among its satirical targets was Richard Blackmore .
Dasypeltis fasciata, commonly known as the Central African egg-eating snake or the western forest eggeater, is a species of snake in the family Colubridae. The species is endemic to Africa . It is one of 18 species in the genus Dasypeltis , and is occasionally kept in captivity as an exotic pet along with other members of its genus ...
Full trisomy 9 is a rare and fatal chromosomal disorder caused by having three copies of chromosome number 9.It can be a viable condition if trisomy affects only part of the cells of the body or in cases of partial trisomy (trisomy 9p) in which cells have a normal set of two entire chromosomes 9 plus part of a third copy, usually of the short arm of the chromosome (arm p).
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These changes include an extra copy of part of chromosome 7 in each cell (partial trisomy 7) or a missing segment of the chromosome in each cell (partial monosomy 7). In some cases, several DNA building blocks ( nucleotides ) are deleted or duplicated in part of chromosome 7.
Familial dysautonomia (FD), also known as Riley–Day syndrome, is a rare, [2] progressive, [3] recessive genetic disorder of the autonomic nervous system [2] that affects the development and survival of sensory, sympathetic, and some parasympathetic neurons in the autonomic and sensory nervous system.