A new dinucleotide repeat polymorphism at the telomere of chromosome 21q reveals a significant difference between male and female rates of recombination
- Cantonal Hospital of Geneva (Switzerland); and others
We have used a half-YAC containing the human chromosome 21 long-arm telomere to clone, map, and characterize a new dinucleotide repeat polymorphism (D21S1575) close to 21qter. The marker is <120 kb from the telomeric (TTAGGG){sub n} sequences and is the most distal highly polymorphic marker on chromosome 21q. This marker has a heterozygosity of 71% because of a variable (TA){sub n} repeat embedded within a long interspersed element (LINE) element. Genotyping of the CEPH families and linkage analysis provided a more accurate determination of the full length of the chromosome 21 genetic map. A highly significant difference was detected between male and female recombination rates in the telomeric region: in the most telomeric 2.3 Mb of chromosome 21q, recombination was only observed in male meioses. 35 refs., 4 figs., 2 tabs.
- OSTI ID:
- 105247
- Journal Information:
- American Journal of Human Genetics, Journal Name: American Journal of Human Genetics Journal Issue: 2 Vol. 57; ISSN 0002-9297; ISSN AJHGAG
- Country of Publication:
- United States
- Language:
- English
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