mosaicism
Noun: A biological condition in which a single organism is composed of two or more populations of cells with distinct genetic compositions. This results from genetic mutations occurring after fertilization during embryonic development, leading to a mixture of cell lines within one individual.
The term is used primarily in genetics, developmental biology, and medicine to describe an individual whose body contains cells with different genetic profiles. - Genetic mosaicism can sometimes explain why a genetic disorder affects only certain parts of the body. - The diagnosis confirmed somatic mosaicism for the mutation.
- Somatic Mosaicism: Refers to mosaicism affecting body cells (somatic cells) but not the germline (egg or sperm cells). The genetic variation is not typically passed to offspring.
- Germline Mosaicism (Gonadal Mosaicism): Refers to mosaicism present in the reproductive cells (germline). This can result in a parent with no symptoms passing a genetic disorder to multiple children.
- Chromosomal Mosaicism: A type of mosaicism involving whole or partial chromosomes, such as in some cases of Turner syndrome or Down syndrome.
- Mosaic (Noun/Adjective): Can refer to the organism itself (a genetic mosaic) or describe the patterned, mixed nature of the condition (mosaic pattern).
- Chimerism: A related but distinct condition where an organism contains cells from two or more different zygotes (fertilized eggs).
- Genetic heterogeneity (within an individual)
- Somatic variation (in a specific context)
The term specifically denotes the state or condition of being mosaic. It is not used to describe the mosaic pattern in art or design. The focus is exclusively on the biological and genetic phenomenon.
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the condition in which an organism has two or more cell populations that differ in genetic makeup
