Read the sentences (1-8) and decide if they are T (true), F(false) or DS (doesn't say). 1 Not all our characteristics come from our genes. 2 Diseases cannot be passed on through genes. 3 Cells have chromosomes from both parents. 4 A gene is made up of DNA. 5 Genes sometimes do not work correctly. 6 Genetic engineering may stop heart disease. 7 Genetically-modified is better than normal food. 8 The writer of the article is in favour of 'designer babies'.