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Definition of heterozygosity :
A measure of the genetic variation in a population; with respect to one locus, stated as the frequency of heterozygotes for that locus.
Compound heterozygosity reflects the diversity of the mutation base for many autosomal recessive genetic disorders.
Heterozygosity: The presence of different alleles at one or more loci on homologous chromosomes.
Loss Of Heterozygosity (LOH)
Because tumor suppressor genes are recessive, cells that contain one normal and one mutated gene — that is, are heterozygous — still behave normally.
Heteroplasmy
See heterozygosity.
Related Terms:
Heterozygosity
The presence of different alleles of a gene at one or more loci. Cf. heterozygote ...
The rate of mutation determines the level of heterozygosity at a locus according to the neutral theory. Heterozygosity is simply the proportion of the population that is heterozygous.
Allelic exclusion: Expression of only one of the two homologous alleles at a locus in the case of heterozygosity.
Offspring of parents that differ in only one genetic characteristic. Usually implies heterozygosity at a single locus under study.
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z ...
In molecular genetics a DNA molecule with strands of different origin. Cf. hybridisation.
Related Terms:
Heterozygosity
The presence of different alleles of a gene at one or more loci. Cf. heterozygote ...
 See also: Allele, Mutation, Chromosome, Gene, Organ
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