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Related Experiment Videos

[Trisomy 9p by mat. t(2;9)(q36;q31)].

H Moirot, C Fessard, J Hémet

    Annales De Genetique
    |March 1, 1977
    PubMed
    Summary

    This study reports on two siblings with partial trisomy 9, a condition resulting from a maternal reciprocal translocation. This genetic abnormality affects chromosome 9, impacting development.

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    Area of Science:

    • Genetics
    • Human Chromosome Abnormalities
    • Pediatric Genetics

    Background:

    • Reciprocal translocations are common chromosomal rearrangements.
    • Maternal translocations can lead to unbalanced gametes and offspring with chromosomal abnormalities.
    • Partial trisomy 9 is a rare condition with variable clinical manifestations.

    Observation:

    • Two siblings presented with clinical features suggestive of a chromosomal disorder.
    • Karyotyping revealed partial trisomy 9 in both affected individuals.
    • The chromosomal abnormality was traced to a balanced reciprocal translocation in the mother.

    Findings:

    • The siblings inherited an unbalanced chromosomal complement, specifically partial trisomy 9.
    • The maternal reciprocal translocation resulted in the formation of unbalanced gametes.
    • This genetic imbalance led to the observed trisomy 9 in the offspring.

    Implications:

    • Understanding the inheritance pattern of maternal translocations is crucial for genetic counseling.
    • Accurate diagnosis of partial trisomy 9 is important for prognosis and management.
    • Further research into the specific genes on chromosome 9 involved in this trisomy can elucidate developmental pathways.

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