Question

Genes are located on the chromosomes on at specific site known as
A. Loci
B. Centrosomes
C. Telomere
D. None of the above

Answer 1

Hint: Chromosomal theory based on inheritance defines that passing genes from one generation to another generation is known as a homologous chromosome. In chromosomes genes are arranged in linear mode. Gene map is used to find the position or place of the gene in a chromosome. Studying the behavior of genes and chromosomes during the meiosis it is proposed that genes are present in the chromosome. Because movement is similar for chromosomes and genes.

Complete answer:
Option A: Loci are also called the locus. It is the fixed specific position where the genes or genetic marker is located. So it is the physical location of genes or the location of other DNA sequences in the chromosomes. It is like the genetic street address. Option A is correct.
Option B: Centrosomes are used in the process of cell division. It is the regulator of the cell cycle progression. It gives the structure for the cell. It mediates the process of chromosome segregation during cell division. It doesn't contain its own DNA sequence. So it is not the correct answer. Option B is incorrect.
Option C: Telomere is presented at the end of the chromosome. It is made by the non coding DNA sequence. So it protects the chromosome from damage. It prevents the missing of genes during cell division. For this purpose it changed into small. Option C is incorrect.
Option D: Locus of the chromosome carries the gene. Genes are located in the locus itself. So it is not the answer. Option D is incorrect.

Therefore, Option A is the correct answer.

Note:
During the cell division process DNA strands become small. So gene acceptance into the chromosomes will be missed. To avoid this, the centromere became small. After the cell division process genes are carried by the chromosomes at the place called locus. One chromosome consists of more genes. Each gene in the chromosome is placed or occupied in a different position. This chromosome is located in the centre of the cell called the nucleus.