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  1. Mosaicism: What It Is and How It’s Treated - WebMD

    Dec 2, 2024 · Mosaicism occurs during pregnancy after the egg has been fertilized and the zygote begins to divide. This occurs when new cells form and the chromosomes replicate themselves …

  2. Medical Genetics: Mosaicism - Stanford Medicine Children's Health

    Mosaicism is when a person has two or more genetically different sets of cells in their body. Chromosomes are stick-shaped structures in the middle of each cell in the body.

  3. Mosaic (genetics) - Wikipedia

    Mosaicism or genetic mosaicism is a condition in which a multicellular organism possesses more than one genetic line as the result of genetic mutation. [1][2] This means that various genetic …

  4. Mosaicism: MedlinePlus Medical Encyclopedia

    Nov 6, 2024 · Mosaicism is caused by an error in cell division very early in the development of the unborn baby. Examples of mosaicism include: Symptoms vary and are very difficult to predict. …

  5. Chromosome Mosaicism | Fact Sheets | Yale Medicine

    Mosaicism occurs when a person has two or more genetically different sets of cells in his or her body. If those abnormal cells begin to outnumber the normal cells, it can lead to disease that …

  6. What Is Mosaicism? Causes, Types, and Health Effects

    Jul 21, 2025 · Mosaicism is a condition where a person has two or more genetically distinct cell populations originating from a single fertilized egg. Much like a mosaic artwork is composed of …

  7. Health Encyclopedia - University of Rochester Medical Center

    Medical Genetics: Mosaicism What is mosaicism? Mosaicism is when a person has two or more genetically different sets of cells in their body. Chromosomes are stick-shaped structures in …

  8. Mosaicism - National Human Genome Research Institute

    2 days ago · Mosaicism refers to the presence of cells in a person that have a different genome from the body’s other cells. This difference could be due to a specific genomic variant, for …

  9. Resources for Genetics Professionals — Mosaicism

    Oct 27, 2022 · Mosaicism is the postzygotic occurrence within a single individual or tissue of two or more cell lines with a different genetic or chromosomal composition that are derived from a …

  10. Mosaicism — Knowledge Hub - GeNotes

    Mosaicism describes the situation where only a subset of the body’s tissues carry a particular variant. Mosaicism occurs when a new variant arises after cells have started to divide; this …