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Turner syndrome is the only full monosomy that is seen in humans — all other cases of full monosomy are lethal and the individual will not survive development. Cri du chat syndrome – (French for "cry of the cat" after the persons' malformed larynx) a partial monosomy caused by a deletion of the end of the short arm of chromosome 5
[1] [2] Three chromosomal abnormalities with ISCN nomenclature, with increasing complexity: (A) A tumour karyotype in a male with loss of the Y chromosome, (B) Prader–Willi Syndrome i.e. deletion in the 15q11-q12 region and (C) an arbitrary karyotype that involves a variety of autosomal and allosomal abnormalities. [ 3 ]
The only non-lethal full monosomy occurring in humans is the one causing Turner's syndrome. Around 30% of Turner's syndrome cases demonstrate mosaicism, while complete monosomy (45, X) occurs in about 50–60% of cases. Mosaicism isn't necessarily deleterious, though.
1 D 1:7,500 1q21.1 deletion syndrome: 1q21.1 D 2q37 deletion syndrome: 2q37 D 5q deletion syndrome: 5q D 5,10-methenyltetrahydrofolate synthetase deficiency: MTHFS [2] 7p22.1 microduplication syndrome: 7p22.1 17q12 microdeletion syndrome: 17q12 [3] [4] 1:14,000-62,500 17q12 microduplication syndrome: 17q12 [5] 18p deletion syndrome: 18p D 1:50,000
Monosomy, with the presence of only one chromosome (instead of the typical two in humans) from a pair, which affects chromosome 14. Fetuses with monosomy 14 are not viable. [1] Only mosaic cases exist and these usually present with severe symptoms such as intellectual disability, ocular colobomata, microcephaly, and seizures. Organ ...
2p15-16.1 microdeletion syndrome; 2q37 monosomy; 3p deletion syndrome; 3q29 microdeletion syndrome; 9q34.3 deletion syndrome; 10q26 deletion; 16p11.2 deletion syndrome; 17q12 microdeletion syndrome; 18p-22q11.2 distal deletion syndrome; 22q13 deletion syndrome
3p deletion syndrome is brought on by the loss of chromosome 3's small (p) arm's end. The majority of 3p deletion syndrome instances are not hereditary. One chromosome is deleted, usually randomly, either in the early stages of fetal development or during the production of reproductive cells, such as eggs or sperm.
2p15-16.1 microdeletion is an extremely rare genetic disorder caused by a small deletion in the short arm of human chromosome 2. First described in two patients in 2007, [ 1 ] by 2013 only 21 [ citation needed ] people have been reported as having the disorder in the medical literature .