Dictionary > Mosaicism

Mosaicism

Definition
noun
A condition wherein two or more cell populations with different genotypes exist in an organism, derived from a single zygote, as a result of experimental manipulation or to faulty distribution of genetic material during mitosis
Supplement
Non-Mendelian inheritance is a type of biological inheritance wherein the patterns of phenotypes do not accord with those as expected in Mendelian laws on inheritance. It includes extranuclear inheritance, gene conversion, infectious heredity, genomic imprinting, mosaicism, and trinucleotide repeat disorders.
Mosaicism is a form of non-Mendelian inheritance wherein two or more cell populations with different genotypes exist in an organism, derived from a single zygote, as a result of experimental manipulation or to faulty distribution of genetic material during mitosis. For example is the rare condition wherein some cells of the body of a patient have XX chromosomes while other cells have XY chromosomes. Another example is the 46/47 XY/XXY mosaic in which the individual contains two sets of cell populations: (1) a population of cells with the normal 46 number of chromosomes and XY genetic constitution, and (2) a cell population with 47 chromosomes and XXY genetic consititution.
Word origin: mosaic + –ism
Synonym(s):

Compare:

  • chimerism
  • See also:

    Related term(s):

  • gonadal mosaicism


    You will also like...

    Sensory systems
    Sensory Systems

    A sensory system is a part of the nervous system consisting of sensory receptors that receive stimuli from the internal ..

    temperature - abiotic factor
    Abiotic and Biotic Factors

    This tutorial deals with the abiotic factors of the freshwater environment that determine what sort of life would be sui..

    Biosecurity and Biocontrol
    Biosecurity and Biocontrol

    This lesson explores the impact of biosecurity threats, and why they need to be identified and managed. Examples to incl..

    Balanced Diet
    A Balanced Diet – Minerals and Proteins

    Proteins and minerals can be derived from various dietary sources. They are essential for the proper growth and developm..

    Cambial cells
    Plant Tissues

    Plant organs are comprised of tissues working together for a common function. The different types of plant tissues are m..

    Muscle
    Muscle

    Muscle cells are specialized to generate force and movement. Learn about the different types of muscle tissues in this t..