What is the relationship between DNA, chromosomes and genes?

DNA, genes and chromosomes. DNA. DNA (deoxyribose nucleic acid) molecules are large and complex. They carry the genetic code that determines the characteristics of a living thing. Except for ... The diagram shows the relationship between the cell, its nucleus, chromosomes in the nucleus, and genes. read more

Despite chromosomes having a large number of genes, those genes are arranged in a very specific sequence. Each gene has a special place within a chromosome, which is called its locus. Most cells in the human body have 23 pairs of chromosomes, with the exception of a few cells like red blood cells, egg cells and sperm. read more

The DNA that makes up the genes on the chromosome string is called"coding DNA" because it is responsible for all genetic characteristics which pass from one generation to the next within a species. There is also DNA on the chromosome string between the genes. read more

Genes contain DNA, the code that directs the development of cells. A mutation in a gene or a cluster of genes can cause a genetic condition or birth defect. Learn more from our experts about genetic disorders and birth defects. read more