Paracentric inversions do not normally generate monocentric recombinant chromosomes
- Women`s and Children`s Hospital, Adelaide (Australia)
- Royal Children`s Hospital, Melbourne (Australia)
Dr. Pettenati et al. recently reported a review of paracentric inversions in humans in which they concluded that carriers of these have a 3.8% risk of viable offspring with recombinant chromosomes. We are of the view that there are serious problems with this estimate which should be much closer to zero. The only recombinant chromosomes which can be generated by a paracentric inversion undergoing a normal meiotic division are dicentrics and acentric fragments. Only two such cases were found by Pettenati et al. Several of the alleged monocentric recombinants were originally reported as arising from parental insertions (3-break rearrangements) and it is not legitimate to include them in any analysis of paracentric inversions. Any monocentric recombinant chromosome can only arise from a paracentric inversion by some abnormal process which must involve chromatid breakage and reunion. 4 refs.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 447087
- Journal Information:
- American Journal of Medical Genetics, Vol. 59, Issue 3; Other Information: PBD: 20 Nov 1995
- Country of Publication:
- United States
- Language:
- English
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