PMID: 589852Nov 1, 1977

Meiotic consequences of an intrachromosomal insertion of chromosome No 1: a family pedigree

Clinical Genetics
S F PanM W Steele

Abstract

In three generations of the proband's patrilineal relatives, 14 subjects were found to be carriers of a "shift" insertional chromosome No. 1 (46XX or XY, ins(1)(p32q25q31)). The proband and three female relatives, who were mild to moderate mental retardates with minor congenital anomalies, were trisomic for the insertional segment, (1)q25q31. Another subject, who was a markedly immature female abortus with congenital abnormalities, was found to be monosomic for this same chromosomal segment. The cytogenetic evidence suggests that each of these unbalanced recombinant progeny was the result of a single crossing over in the noninsertional loop of a paternal pachytene bivalent of the balanced insertional chromosome No. 1.

References

Jul 8, 1972·Lancet·J E GrayW D Elliott
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Sep 30, 1972·Lancet·L R Shapiro, D Warburton
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Citations

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Related Concepts

Multiple Congenital Anomalies
Autosome Abnormalities
Chromosomes, Human,1-3
Crossing Over, Genetic
Ear Structure
Fingers
M Phase, Meiotic
Profound Mental Retardation
Micrognathism
Microphthalmos

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