what is the difference between DNA,genes and chromosomes?
A chromosome is a structure that is made of a chemical known as deoxyribonucleic acid, or DNA as well as protein. Chromosomes are found in the nucleus of cells. Chromosomes contain many genes.
A gene is a molecular unit of heredity. Each gene codes for a polypeptide, which becomes a protein that performs a function in a living thing. The DNA molecules are very long and in order to fit inside the nucleus of a cell, they are highly coiled and condensed.
The chromosomes are in pair which look like this for Humans, 23 pairs in total.
Chromosome contains genes, and A gene is a sequence of DNA or RNA which codes for a molecule that has a function. A human has around 20,000 genes.
Genes contain patterns and long chains of DNA. So, DNA is basic material, with which chromosome are made.