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Definition of «Chromosomes»


Chromosomes: The microscopically visible carriers of the genetic material. They are composed of deoxyribonucleic acid (DNA) and proteins and, under a microscope, look like little rods.

Humans normally have 46 chromosomes -- 44 autosomes (nonsex chromosomes) plus XX sex chromosomes in the case of the female and XY sex chromosomes in the case of the male.

For a more thorough consideration of our chromosomes, please see the entry to Chromosome.

For More Information «Chromosomes»

  • chromosome: Definition from Answers.com

    Microscopic, threadlike part of a cell that carries hereditary information in the form of genes. The structure and location of chromosomes differentiate prokaryotic cells ...

  • Genome.gov | Chromosomes Fact Sheet

    What is a chromosome? What do chromosomes do? Do all living things have the same types of chromosomes? What are centromeres? What are telomeres? How many chromosomes do humans ...

  • Chromosomes X and Y and Sex Determination ...

    A look at the two human sex chromosomes (X and Y) and sex linked genes.

  • Chromosomes

    Composition In eukaryotes, chromosomes consist of a single molecule of DNA [Link to visual proof] associated with: many copies of 5 kinds of histones.

  • What is a chromosome? - Genetics Home Reference

    In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes. Each chromosome is made up of DNA tightly coiled many ...

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