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Familial translocation t(10;21)(q22;q22)
Human Genetics
|September 1, 1979
Summary
A family experienced recurrent miscarriages and malformed children due to a balanced translocation t(10;21)(q22;q22). This genetic condition led to partial trisomy 10 and monosomy 21 in offspring.
Area of Science:
- Genetics
- Human Genetics
- Reproductive Genetics
Background:
- A family history of recurrent miscarriages and congenital anomalies was investigated.
- The study focused on a specific chromosomal translocation, t(10;21)(q22;q22), observed across three generations.
Observation:
- Two sisters presented with multiple congenital malformations.
- Genetic analysis revealed abnormalities in chromosomes 10 and 21 in the affected individuals.
Findings:
- The affected children exhibited partial trisomy of chromosome 10 and monosomy of chromosome 21.
- These chromosomal imbalances resulted from adjacent-2 meiotic segregation of the maternal translocation.
Implications:
- This case highlights the reproductive risks associated with balanced translocations.
- Understanding meiotic segregation patterns is crucial for genetic counseling in families with chromosomal rearrangements.