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A familial extra small marker autosome in persons with normal phenotype
Human Heredity
|January 1, 1979
Summary
A rare chromosomal abnormality, t(13q14q) translocation, was identified in a male patient experiencing sterility and oligospermia. This genetic condition involves a rearranged chromosome 13, impacting fertility.
Area of Science:
- Human Genetics
- Reproductive Biology
- Cytogenetics
Background:
- Investigating the genetic basis of male infertility and sterility.
- Understanding the impact of chromosomal abnormalities on reproductive health.
Observation:
- A propositus presented with sterility and oligospermia, exhibiting a karyotype of 45, XY, t(13q14q).
- The patient's mother and fertile brother had 47 chromosomes, with an additional G-chromosome-sized element showing satellites on both arms, indicating a familial translocation.
Findings:
- The propositus has a Robertsonian translocation between chromosome 13, specifically t(13q14q).
- Familial occurrence of an extra chromosome, likely resulting from unbalanced segregation of the translocation, was observed in the mother and brother, despite normal phenotypes.
Implications:
- This case highlights the complex relationship between chromosomal translocations and fertility outcomes.
- Understanding familial translocations is crucial for genetic counseling and reproductive planning in affected families.