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chromosome - 7 dictionary results
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chro⋅mo⋅some
[kroh-muh-sohm] 
məˌsoʊm
–noun Genetics.
| 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. |
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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Based on the Random House Dictionary, © Random House, Inc. 2009.
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Link To chromosome
| chro·mo·some (krō'mə-sōm') n.
|
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Chromosome
Chro"mo*some`\, n. [Gr. ? color + ? the body.] (Biol.) One of the minute bodies into which the chromatin of the nucleus is resolved during mitotic cell division; the idant of Weismann.
Webster's Revised Unabridged Dictionary, © 1996, 1998 MICRA, Inc.
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chromosome
1889, from Ger. Chromosom, coined 1888 by Ger. anatomist Wilhelm von Waldeyer-Hartz (1836-1921), from Gk. khroma "color" + soma "body." So called because the structures contain a substance that stains readily with basic dyes.
Online Etymology Dictionary, © 2001 Douglas Harper
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Main Entry: chro·mo·some
Pronunciation: 'krO-m&-"sOm, -"zOm
Function: noun
: any of the usually linear bodies of the cell nucleus ofeukaryotic organisms, the usually circular bodies of prokaryotic organisms (as bacteria), or especially in some schools of molecular biology the genomes of DNA viruses (as bacteriophages) that take upbasophilic stains and contain most or all of the genes of the organism
Merriam-Webster's Medical Dictionary, © 2002 Merriam-Webster, Inc.
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chromosome chro·mo·some (krō'mə-sōm')
n.
- A threadlike linear strand of DNA and associated proteins in the nucleus of animal and plant cells that carries the genes and functions in the transmission of hereditary information.
- A circular strand of DNA in bacteria and cyanobacteria that contains the hereditary information necessary for cell life.
chro'mo·so'mal (-sō'məl) or chro'mo·so'mic (-sō'mĭk) adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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chromosome (krō'mə-sōm') Pronunciation Key
(click for larger image in new window) 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. |
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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