Best answer: What is p and q arm of chromosome?

Each chromosome is divided into two sections (arms) based on the location of a narrowing (constriction) called the centromere. By convention, the shorter arm is called p, and the longer arm is called q. The chromosome arm is the second part of the gene’s address.

What is P and Q in chromosome?

q arm of a chromosome: The long arm of a chromosome. … 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 does P and Q stand for in genetics?

Each chromosome is divided into two sections (arms) based on the location of a narrowing (constriction) called the centromere. By convention, the shorter arm is called p, and the longer arm is called q. The chromosome arm is the second part of the gene’s address.

What is Q arm?

The q arm is the longest arm. It can be large in comparison to the other arm – the p arm – or it can be similar size or any size in between. Naming the arms of the chromosomes is of benefit when noting the locations of a gene within the genome or the location of a variant associated with a condition.

Do centromeres replicate?

Very late replication of centromeres has been proposed to play a role in centromere function (Dupraw 1968; Csink and Henikoff 1998). In contrast to expectation, we show that centromeres replicate as isolated domains early in S phase. At this time, they are surrounded by heterochromatin that has not yet replicated.

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What does Q mean in genetics?

Definition. Each human chromosome has a short arm (“p” for “petit”) and long arm (“q” for “queue”), separated by a centromere. The ends of the chromosome are called telomeres.

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