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

  • p — 1. Abbreviation for pupil; optic papilla. 2. In polynucleotide symbolism, phosphoric ester or phosphate. 3. Symbol for pico (2); the negative decadic logarathm; proton; protein; momentum (in italics). 4. In …   Medical dictionary

  • p — 1. new penny; new pence. 2. perch. 3. pico . 4. the short arm of a chromosome (opposed to q). {Phrase Origin: French petit} …   Australian English 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 — For a non technical introduction to the topic, see Introduction to genetics. Diagram of a replicated and condensed metaphase eukaryotic chromosome. (1) Chromatid – one of the two identical parts of the chromosome after S phase. (2)… …   Wikipedia

  • 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

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  • 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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