p arm of a chromosome
The short arm of a chromosome. The "p" comes from the French "petit" meaning small. All human chromosomes have 2 arms - the p (short) arm and the q (long) arm - that are separated from each other only by a primary constriction, the centromere, the point at which the chromosome is attached to the spindle during cell division. The symbol "q" was chosen for the long arm simply because it followed "p" in the alphabet.

Medical dictionary. 2011.

Look at other dictionaries:

  • q arm of a chromosome — The long arm of a chromosome. All human chromosomes have 2 arms a short arm and a long arm that are separated from each other only by the centromere, the point at which the chromosome is attached to the spindle during cell division. By… …   Medical dictionary

  • Long arm of a chromosome — The long arm of a chromosome is termed the q arm. All human chromosomes have 2 arms, the p (short) arm and the q (long) arm. They are separated from each other only by a primary constriction, the centromere, the point at which the chromosome is… …   Medical dictionary

  • Short arm of a chromosome — The short arm of a human chromosome is symbolized by convention as p . The p comes from the French petit meaning small. All human chromosomes have 2 arms, the p (short) arm and the q (long) arm. They are separated from each other only by a… …   Medical dictionary

  • Chromosome 5 (human) — Chromosome 5 is one of the 23 pairs of chromosomes in humans. People normally have two copies of this chromosome. Chromosome 5 spans about 181 million base pairs (the building blocks of DNA) and represents almost 6% of the total DNA in cells.… …   Wikipedia

  • Chromosome 13 (human) — Chromosome 13 is one of the 23 pairs of chromosomes in humans. People normally have two copies of this chromosome. Chromosome 13 spans about 114 million base pairs (the building material of DNA) and represents between 3.5 and 4 % of the… …   Wikipedia

  • Chromosome 2 (human) — Chromosome 2 is one of the 23 pairs of chromosomes in humans. People normally have two copies of this chromosome. Chromosome 2 is the second largest human chromosome, spanning more than 237 million base pairs [1] (the building material of DNA)… …   Wikipedia

  • Chromosome 15q trisomy — is an extremely rare genetic disorder, caused by a chromosomal aberration in which there is an excess copy of the long ( q ) arm of human chromosome 15. The disorder is also known as Distal Duplication 15q and Partial Duplication 15q Syndrome.… …   Wikipedia

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  • Chromosome regions — Diagram of a duplicated and condensed (metaphase) eukaryotic 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) …   Wikipedia

  • Chromosome 3 (human) — Short and long arms Chromosome 3 is one of the 23 pairs of chromosomes in humans. People normally have two copies of this chromosome. Chromosome 3 spans almost 200 million base pairs (the building material of DNA) and represents about 6.5 percent …   Wikipedia

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