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NCI Dictionary of Genetics Terms


4 results found for: H



  • haplotype  listen  (HA-ploh-tipe)
    A set of closely linked genetic markers present on one chromosome which tend to be inherited together.

  • heteroduplex analysis  listen  (HEH-teh-roh-DOO-plex uh-NA-lih-sis)
    A method of detecting sequence differences between normal DNA and the DNA to be tested. It is commonly used as a screening method to detect potential mutations in a gene.

  • heterozygous genotype  listen  (HEH-teh-roh-ZY-gus JEE-noh-tipe)
    Occurs when the two alleles at a particular gene locus are different. A heterozygous genotype may include one normal allele and one mutation, or two different mutations. The latter is called a compound heterozygote.

  • homozygous genotype  listen  (HOH-moh-ZY-gus JEE-noh-tipe)
    Occurs when both alleles at a particular gene locus are the same. A person may be homozygous for the normal allele or for a mutation.