AN EXAMPLE OF GENETIC ENGINEERING Did you know that ____ have put a ____ into a tomato? They did it to develop ____ which can grow in ____ temperatures. DEFINING GENES So what are genes? Genes are ____ which exist inside every cell of every living thing. Each cell in the ____ contains about 25,000 to 35,000 genes which determine your ____ colour, how tall your are, what skills you have, and so on. So if you alter a plant gene, you can change a specific characteristic like colour, ____ or height. WHAT GENETIC ENGINEERING CAN DO Genetic engineering ____ the genes of plants or animals to make genetically ____ organisms (GMOs). Scientists believe that GMOs can help us in many ways. For example, GM crops can produce ____ which contains more nutrients. They can also have an engineered ____ to insects and diseases, and stay fresh ____ GMOs can make fish grow larger and make cows produce healthier ____. Some people think that if we want to feed the world’s population, we ____ GMOs. GENETIC ENGINEERING AND WEEDS But does genetic engineering work? Farmers use herbicides to ____, but these ____ can also damage crops. In the USA, farmers use GM crops which resist herbicides, so that they can ____ weeds without damaging the crop. However, some „superweeds“ are becoming immune to the herbicides, so the ____ have to use more and more chemicals. DOUBTS ABOUT GENETIC ENGINEERING Food is very ____ to all of us, and many people believe that "we are what we eat". These people are ____ the overuse of chemicals and the possible ____ of eating GMOs. Some ____ oppose them. What do you think?

Genetic Engineering

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