Genes are the instructions for creating protiens. These protiens govern how the cell acts grows reproduces etc. Chromosomes are bundels of DNA containg many Genes. They not only protect and sort the genes by bundeling them up but they also have an efect on what Genes are exspressed. Certain protiens will bind with the Chromosomes meaning some Genens can be read by the cell's mecheory resulting in their corisponding protiens and others can't.