Why are chromosomes arms called P and Q?
Origin of p and q as chromosome arms: The symbol “p” was chosen to designate the short arm because “p” stands for “petit”, “small” in French. The letter “q” was selected to signify the long arm merely because “q” is the next letter in the alphabet.
What is a single arm chromosome?
Isochromosomes are chromosomes composed of mirror images of one of the arms of the chromosome. As a result, the opposite chromosome arm may be deleted and the cells only have a single copy of the genetic material in the arm present in the normal member of the homologous pair.
What do you mean by Telocentric?
: having the centromere terminally situated so that there is only one chromosomal arm a telocentric chromosome.
What does a centrosome look like?
Centrosomes are made up of two, barrel-shaped clusters of microtubules called “centrioles” and a complex of proteins that help additional microtubules to form. This complex is also known as the microtubule-organizing center (MTOC), since it helps organize the spindle fibers during mitosis.
Is centromere and centrosome the same thing?
The centromere is the central region of the chromosome which consists of highly constricted DNA. The centrosome is an organelle that serves as the organizing centre of all microtubules in an animal cell.