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Related to Chromosomes: Human chromosomes
Spaghetti-like structures located within the nucleus (or central portion) of each cell. Chromosomes contain the genetic information necessary to direct the development and functioning of all cells and systems in the body. They pass on hereditary traits from parents to child (like eye color) and determine whether the child will be male or female.
chromosomescarriers of genetic material in the nucleus of body cells. Each consists mainly of an elongated macromolecule of deoxyribonucleic acid (DNA). In human cells there are 23 pairs of chromosomes, each with a 'string' of hundreds to thousands of genes; one of each pair is derived from the germ cell (ovum or sperm) of each parent. One of the pairs are the sex chromosomes, known as 'XX' in the female, 'XY' in the male; splitting of the pairs in the formation of the germ cells in the gonads provides either an X or a Y chromosome in each sperm, so that combination with an X at fertilization determines the gender of the offspring.
chromosomes48 gene-carrying intranuclear structures arranged as 24 pairs (23 identical pairs and one non-matched pair of sex chromosomes; male sex chromosome has ‘X’ and ‘Y’ components [XY]; female sex chromosome has two ‘X’ components [XX]); each pair of chromosomes reproduces itself during mitosis so that daughter cells each receive a full complement of 24 chromosome pairs; undergo reduction division during meiosis (i.e. ova or sperm formation) and each germ cell has only 24 single chromosomes (i.e. one chromosome from each of the 23 paired chromosomes, one chromosome from the dissimilar pair, as either an ‘X’ or a ‘Y’ chromosome; following fusion of ovum (X or X) with sperm (X or Y), the fertilized egg carries a full complement of 24 pairs of chromosomes, and the sex of the individual is determined at conception (XX or XY)
n the small, dark-staining, and more or less rod-shaped bodies situated in the nucleus of a cell. At the time of cell division, chromosomes divide and distribute equally to the daughter cells. They contain genes arranged along their length. The number of chromosomes in the somatic cells of an individual is constant (the diploid number), whereas just half this number (the haploid number) appears in germ cells.
n a rearrangement of chromosome parts as a result of breakage and reunion of broken ends.