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Duplication 11p11.3 leads to 14.1 to meiotic crossing--over
American Journal of Medical Genetics
|January 1, 1980
Insights
A rare genetic condition, inverted duplication of 11p, caused an infant
Area of Science:
- Human Genetics
- Developmental Biology
- Medical Genetics
Background:
- Genetic duplications and deletions can lead to developmental abnormalities.
- Chromosomal rearrangements are a source of genetic disorders.
Observation:
- An infant presented with macular dysfunction, cleft lip and palate, and developmental delay.
- Genetic analysis revealed an inverted duplication of chromosome 11p11.3-p14.1 in the infant.
Findings:
- The infant's condition resulted from meiotic recombination following an intrachromosomal "shift" in the mother.
- A half-sister had a reciprocal recombinant with a deletion in the same chromosomal region (11p11.3-11p14.1).
Implications:
- This case highlights the complex mechanisms of chromosomal rearrangements during meiosis.
- Understanding these rearrangements is crucial for genetic counseling and diagnosing developmental disorders.
- Identifies a specific chromosomal region associated with a spectrum of developmental abnormalities.
Abstract:
An infant with macular dysfunction, cleft lip and palate, and developmental delay was shown to have an inverted duplication of 11p11.3 leads to p14.1 on the basis of meiotic recombination subsequent to an intrachromosomal "shift" in his mother. A half-sister had previously been shown [3] to have the reciprocal recombinant with resultant deletion of 11p11.3 leads to 11p14.1.