Question

Consider the chromosome.
Which is indicated by the letter a

Answer 1

The options to the question are,

a. petit arm  

b. queue arm  

c. centromere gene

The answer is a. petit arm.

Chromosomes are thread like structures containing the DNA and are present inside the nucleus of cells.

Each chromosome has a point of constriction called the centromere, which divides the chromosome into two arms.

1. The long arm is called p arm (petit arm) and
2. The short arm is called q arm (letter q comes after p).

The location of centromere on a chromosome gives a particular shape to the chromosome, which is used to identify specific genes.

Answer 2

The Chromosomes

Explanation:

1. The chromosomes  of  DNA atom is bundled into string like structures called chromosomes.
2. Every chromosome is comprised of DNA firmly looped commonly around proteins considered histones that help its structure.  
3. The pieces of a chromosome are the Centromere, the Kinetochores, the Telomeres and a couple of sister Chromatids.
4. The chromatids are each isolated into a "p" arm and a "q" arm. (The p arm is the shorter one).
5. The centromere is the part that associates the two chromatids together in a X shape.  
6. Chromosomes can be recognized by their number, size, centromere position, and banding design.
7. In a human karyotype, autosomes or "body chromosomes" (the entirety of the non–sex chromosomes) are commonly sorted out in inexact request of size from biggest (chromosome 1) to littlest (chromosome 22).
8. Female have a Two X chromosomes while males have a One Y chromosome and one X chromosome.
9. The Y chromosome contains a quality, The Y chromosomes of people and different vertebrates additionally contain different qualities required for typical sperm creation.