Scotland (e.g. thick fur) be 0.067 (for malic acid) or for students why those or Africa (thin fur, less grapes use 0.075 (for tartaric characteristics are requirement for water. acid). suitable. Establish the idea that new breeds of animals There should be obvious Digital: Farm breeds and plant are produced differences in acidity between and varieties to be the most use in a different varieties of fruit. presentation certain set of environmental conditions. Equipment: eye protection, different varieties of the same 2) Woolly sheep have species of fruit (e.g. oranges, been bred to produce a limes), preferably sliced in lot of wool. However their half, fruit juicer/squeezer, 2 long woolly tails trap pipettes or syringes or small faeces and mud and measuring cylinders, burette, become infested with clamp and stand, filter funnel, maggots. So farmers filter paper, small beaker, ‘dock’ the tails of sheep. conical flask, phenolphthalein It would be easier to indicator, 0.1 ml dm–3 sodium farm woolly sheep that hydroxide solution, distilled had naturally short tails. water Ask students how they Optional: refractometer, would breed woolly sheep accurate balance (for Brix with naturally short tails. measurements), knife to cut fruits CB4e Genes in B4.14 Evaluate the benefits and 1) Tell students a plant Students research and think Remind students of agriculture and risks of genetic engineering breeder wishes to about the benefits and risks of the overall process of medicine and selective breeding in produce a new variety of a range of selectively genetic engineering. modern agriculture and orange. Ask students to bred/genetically engineered Use four different medicine including practical come up with a list of organisms. colours of individual
Scotland (e.g. thick fur) or Africa (thin fur, less requirement for water. Establish the idea that new breeds of animals and plant are produced to be the most use in a certain set of environmental conditions. 2) Woolly sheep have been bred to produce a lot of wool. However their long woolly tails trap faeces and mud and become infested with maggots. So farmers ‘dock’ the tails of sheep. It would be easier to farm woolly sheep that had naturally short tails. Ask students how they would breed woolly sheep with naturally short tails. be 0.067 (for malic acid) or for grapes use 0.075 (for tartaric acid). There should be obvious differences in acidity between different varieties of fruit. Equipment: eye protection, different varieties of the same species of fruit (e.g. oranges, limes), preferably sliced in half, fruit juicer/squeezer, 2 pipettes or syringes or small measuring cylinders, burette, clamp and stand, filter funnel, filter paper, small beaker, conical flask, phenolphthalein indicator, 0.1 ml dm–3 sodium hydroxide solution, distilled water Optional: refractometer, accurate balance (for Brix measurements), knife to cut fruits students why those characteristics are suitable. Digital: Farm breeds and varieties presentation CB4e Genes in agriculture and medicine B4.14 Evaluate the benefits and risks of genetic engineering and selective breeding in modern agriculture and medicine including practical 1) Tell students a plant breeder wishes to produce a new variety of orange. Ask students to come up with a list of Students research and think about the benefits and risks of a range of selectively bred/genetically engineered organisms. Remind students of the overall process of genetic engineering. Use four different colours of individual
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