Nonchromosomal
[kroh-muh-sohm] /ˈkroʊ məˌsoʊm/
noun, Genetics.
1.
any of several threadlike bodies, consisting of chromatin, that carry the genes in a linear order: the human species has 23 pairs, designated 1 to 22 in order of decreasing size and X and Y for the female and male sex chromosomes respectively.
/ˈkrəʊməˌsəʊm/
noun
1.
any of the microscopic rod-shaped structures that appear in a cell nucleus during cell division, consisting of nucleoprotein arranged into units (genes) that are responsible for the transmission of hereditary characteristics See also homologous chromosomes
n.
1889, from German Chromosom, coined 1888 by German anatomist Wilhelm von Waldeyer-Hartz (1836-1921), from Latinized form of Greek khroma “color” (see chroma) + -some (3)). So called because the structures contain a substance that stains readily with basic dyes.
nonchromosomal non·chro·mo·som·al (nŏn’krō-mə-sō’məl)
adj.
Not situated on or involving a chromosome.
chromosome chro·mo·some (krō’mə-sōm’)
n.
chro’mo·so’mal (-sō’məl) or chro’mo·so’mic (-sō’mĭk) adj.
chromosome
(krō’mə-sōm’)
A structure in all living cells that consists of a single molecule of DNA bonded to various proteins and that carries the genes determining heredity. In all eukaryotic cells, the chromosomes occur as threadlike strands in the nucleus. During cell reproduction, these strands coil up and condense into much thicker structures that are easily viewed under a microscope. Chromosomes occur in pairs in all of the cells of eukaryotes except the reproductive cells, which have one of each chromosome, and some red blood cells (such as those of mammals) that expel their nuclei. In bacterial cells and other prokaryotes, which have no nucleus, the chromosome is a circular strand of DNA located in the cytoplasm.
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