what exactly DNA, gene , choromosome
and what is relation between these three
DNA :- DNA stands for Deoxyribonucleic acid. DNA is a hereditary unit of the cell which contains information for development and functioning of the organism.
Gene:- A segment of DNA which codes for a protein is known as gene.
Chromosome:- DNA and some basic proteins called histones form structure called chromosome
In the nucleus of a cell thread like structures known as chromosomes are present which contains DNA and genes.