Compound heterozygote
Compound heterozygote: The presence of two different mutant alleles at a particular gene locus, one on each chromosome of a pair.
The human genome contains two copies of each gene, a paternal and a maternal allele. A mutation affecting only one allele is called heterozygous. A homozygous mutation is the presence of the identical mutation on both alleles of a specific gene. However, when both alleles of a gene harbor mutations, but the mutations are different, these mutations are called compound heterozygous. Also called a genetic compound.
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Compound microscope: A microscope that consists of two microscopes in series, the first serving as the ocular lens (close to the eye) and the second serving as the objective lens (close to the object to be viewed).
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Compress: Cloth or another material applied under pressure to an area of the skin and held in place for a period of time. A compress can be any temperature, and it can be dry or wet. It may also be impregnated with medication or an herbal remedy. Most compresses are used to relieve inflammation.
- Compression
Compression: 1. The act of pressing together. As in a compression fracture, nerve compression, or spinal cord compression. 2. To shorten in time. In embryology, there may be compression of development with some stages even omitted.
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Compression fracture: A fracture caused by compression, the act of pressing together. Compression fractures of the vertebrae are especially common in elderly people.
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Computed tomography: An x-ray procedure that uses the help of a computer to produce a detailed picture of a cross section of the body. Also called a CT scan or CAT scan.