difference dna genes and chromosomes
DNA is the chemical that chromosomes and genes are made of. DNA itself is made up of four simple chemical units that are abbreviated as A, G, C, and T. These letters are used to form three letter words that cells can read. A chromosome is simply a very long piece of DNA that cells can easily copy.
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.
A Gene is a particular section of the chromosome's DNA string. There are many such sections on the DNA string-thus it contains (also calls 'codes') many genes-in humans between 500 and 4500 depending on what chromosome. One gene contains information for producing one particular protein.