ocr: Gene Ab - basic unit of - heredity. Genes transfer traits- -like eye and hair colour -from one cell to another, and from parent to child. Within every cell there are chromosomes, which are made up of genes, which in turn are made up OfDNA. Genes control the tunctions of a cell, such as growth. Genes are involved in the development of some and possibly all cancers, though scientists don't completely understand how. DONE
