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Date: 2002: Source: Human Chromosomes from "Human Genome Landmarks: Selected Genes, Traits, and Disorders" Poster, 2002. (Gene Gateway) from Human Genome Project (1990-2003) Image Gallery Archive
G-banding, G banding or Giemsa banding is a technique used in cytogenetics to produce a visible karyotype by staining condensed chromosomes. It is the most common chromosome banding method. [1] It is useful for identifying genetic diseases (mainly chromosomal abnormalities) through the photographic representation of the entire chromosome ...
The basic number of chromosomes in the somatic cells of an individual or a species is called the somatic number and is designated 2n. In the germ-line (the sex cells) the chromosome number is n (humans: n = 23). [4] [5] p28 Thus, in humans 2n = 46. So, in normal diploid organisms, autosomal chromosomes are present in two copies.
English: Scheme of a Chromosome. (1) Chromatid. One of the two identical parts of the chromosome after S phase. (2) Centromere. The point where the two chromatids touch, and where the microtubules attach. (3) Short (p) arm (4) Long (q) arm. In accordance with the display rules in Cytogenetics, the short arm is on top.
Aligned chromosomes by centromeres, simplified the image elements. 13:05, 8 December 2014: 744 × 1,052 (21 KB) Aryn89: Text boxes changed: 12:57, 8 December 2014: 744 × 1,052 (28 KB) Aryn89: Text boxes replaced with plain text, so that no black boxes occure in the uploaded file: 12:52, 8 December 2014: 744 × 1,052 (29 KB) Aryn89
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This is an accepted version of this page This is the latest accepted revision, reviewed on 23 January 2025. DNA molecule containing genetic material of a cell This article is about the DNA molecule. For the genetic algorithm, see Chromosome (genetic algorithm). Chromosome (10 7 - 10 10 bp) DNA Gene (10 3 - 10 6 bp) Function A chromosome and its packaged long strand of DNA unraveled. The DNA's ...
In eukaryotes, such as humans, roughly 3.2 billion nucleotides are spread out over 23 different chromosomes (males have both an X chromosome and a Y chromosome instead of a pair of X chromosomes as seen in females). Each chromosome consists enormously long linear DNA molecule associated with proteins that fold and pack the fine thread of DNA ...