Females homozygous for the sex-linked dominant, Bar, occasionally give rise to wild-type reversions and to forms with more extreme eye reduction than Bar. This behavior was shown by Sturtevant' to result from unequal crossing-over. The Bar-reverted type was considered to be a deficiency for the Bar gene; while the extreme form, called Ultra-Bar or Double-Bar, was interpreted as a duplication fo...

The chromosome 17q21.31 microduplication syndrome is a rare genetic presenting with craniofacial dysmorphisms, psychomotor delay, microcephaly, behavioral disorders, and poor social interaction. Only ten patients have been reported in the literature until today. All share some specific features, including autism spectrum disorder (ASD). Here, new case of this an 11-year-old Caucasian child who ...

Chromosome Xq22.2 contains the entire proteolipid protein 1 gene (PLP1), and a genomic duplication in that chromosome is responsible for Pelizaeus-Merzbacher disease (PMD). Duplication can be detected using several molecular diagnostic methods such as comparative multiplex PCR, fluorescent in situ hybridization (FISH), restriction site polymorphism (RSP) analysis, and multiplex ligation-dependa...

Chromosome engineering in mice enables the construction of models of human chromosomal diseases and provides key reagents for genetic studies. To begin to define functional information for a small portion of chromosome 11, deficiencies, duplications, and inversions were constructed in embryonic stem cells with sizes ranging from 1 Mb to 22 cM. Two deficiencies and three duplications were establ...

Charcot-Marie-Tooth disease type 1 (CMT1) is a hereditary motor and sensory neuropathy. The autosomal dominant subtype is often linked with a large duplication on chromosome 17p11.2. The gene encoding the peripheral myelin protein PMP 22 (the critical gene in this subtype of CMT1) is located within this duplication. To detect this duplication in chromosomal DNA from individuals thought to have ...

Imprinted genomic regions have been defined by the production of mice with uniparental inheritance or duplication of homologous chromosome regions. With most of the genome investigated, paternal duplication of only distal chromosomes 7 and 12 results in the lack of offspring, and prenatal lethality is presumed. Aberrant expression of imprinted genes in these two autosomal regions is therefore s...

Interstitial duplications of 8q12 encompassing CHD7 have recently been described as a new microduplication syndrome. Three 8q12 duplications have been reported with shared recognizable phenotype: Duane anomaly, developmental delay and dysmorphic facial features. We identified a 2.7 Mb duplication on chromosome 8q12 with SNP-array in a patient with growth delay, congenital heart defects, ear ano...

some llp15.3-.pter and monosomic for chromosome 5p15.3-.pter (karyotype 46,XY,der(5)t(5;ll)(pl5.3;pl5.3)pat). Paternally derived duplications of llpl5.5 are associated with Beckwith-Wiedemann syndrome (BWS) and both family members trisomic for llpl5.5 had prenatal overgrowth (birth weights >97th centile), macroglossia, coarse facial features, and broad hands. We review the clinical features of ...

Gingival fibromatosis (GF) occurs in several genetic forms as a simple Mendelian trait, in malformation syndromes, and in some chromosomal disorders. Specific genes responsible for GF have not been identified. An autosomal dominant form of hereditary gingival fibromatosis (HGF, MIM 135300) was recently mapped to chromosome 2p21 in a large Brazilian family and there was an earlier report of GF i...

Fast neutron radiation has been used as a mutagen to develop extensive mutant collections. However, the genome-wide structural consequences of fast neutron radiation are not well understood. Here, we examine the genome-wide structural variants observed among 264 soybean [Glycine max (L.) Merrill] plants sampled from a large fast neutron-mutagenized population. While deletion rates were similar ...