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Related Experiment Videos

Physical and genetic maps for chromosome 10

J B Lichter1, M J Difilippantonio, A J Pakstis

  • 1Yale University, Department of Genetics, New Haven, Connecticut 06510.

Genomics
|May 1, 1993
PubMed
Summary

This study maps 14 loci on chromosome 10 using fluorescence in situ hybridization (FISH), confirming and refining their positions. Recombination rates differ between sexes and are reduced at the centromere.

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Area of Science:

  • Genetics
  • Cytogenetics
  • Genomic Mapping

Background:

  • Physical mapping provides precise locus locations on chromosomes.
  • Understanding recombination patterns is crucial for genetic studies.

Purpose of the Study:

  • To construct a fluorescence in situ hybridization (FISH) physical map for 14 polymorphic loci on human chromosome 10.
  • To compare physical distances with genetic linkage data and analyze sex-specific recombination rates.

Main Methods:

  • Utilized fluorescence in situ hybridization (FISH) to map 14 loci on chromosome 10.
  • Compared FISH-derived physical map distances with existing genetic linkage map data.

Main Results:

  • A FISH physical map covering over 62% of chromosome 10 was generated, confirming, refining, and mapping new loci.

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  • FISH-ordered loci agreed with genetic linkage data.
  • Sex-specific recombination rates were observed, with higher rates in females.
  • Reduced recombination was noted at the centromere compared to the q arm.

    • Conclusions:

    • The physical map provides a high-resolution framework for chromosome 10.
    • Significant differences in recombination rates between sexes and chromosomal regions were identified.
    • FISH mapping is a valuable tool for integrating physical and genetic maps.