Apparent transmission distortion of a pericentric chromosome one inversion in a large multi-generation pedigree

American Journal of Medical Genetics. Part a
Christina HoneywellM Elizabeth McCready

Abstract

Pericentric chromosome inversions are often associated with infertility, recurrent pregnancy loss, and an increased risk for offspring with congenital anomalies. We report on a chromosome 1 inversion between 1p36.21 and 1q42.13, one of the largest described familial pericentric inversions of chromosome 1. The inversion was ascertained following the birth of a female with multiple congenital anomalies due to a recombinant chromosome 1. The inversion was subsequently detected or inferred in 16 healthy individuals over five generations. Interestingly, with a ratio of 16 carriers to 6 noncarriers, there appears to be transmission distortion of the inverted chromosome 1 within the family. Although there is no reported difficulty conceiving in the family, the risk of miscarriage is higher than predicted at 34% (13/38). The recurrence risk of a recombinant chromosome also appears to be lower than expected based on the mode of ascertainment. This case contributes to the spectrum of clinical features of chromosome 1 recombinants and raises the question of whether or not there is a selective advantage of the inverted chromosome at meiosis, conception, or post-zygotically that has contributed to transmission distortion of the inverted chr...Continue Reading

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Citations

Dec 18, 2012·Human Genetics·Lam Opal HuangClaire Infante-Rivard
Nov 26, 2015·Molecular Cytogenetics·Hande Küçük Kurtulganİlhan Sezgin
Aug 7, 2014·Systems Biology in Reproductive Medicine·Yuqin LuoFan Jin

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