M5U3welcometotheunit.pptx

Book 5 Unit 3 Science and Nature Welcome to the unitLead-inWhat is cloning?Scientific definitionScientific definitionCloning is the creation of cells or whole animals by using DNA(脱氧核糖核酸脱氧核糖核酸)from a single parent,by passing(绕道而行绕道而行)the normal reproductive(生殖生殖)process.The clone has the same DNA to the“parent”.Do you know cloning?Look at the following pictures and say what you know about them.Im the worlds first cloned mammal Dolly.Choose one and share information with others.Model123456Welcome to the unitDolly:the worlds first cloned animal created by Scottish scientists in 1996 caused worldwide discussion died in 2003 because of lung disease There are still many countries doing research on cloning technology.ModelModelWelcome to the unitI was created using a cell from an adult cat.The kitten in the picture is called Cc.Its name is from Copycat.Scientists in the USA created it with a cell taken from its mother,Rainbow.It was born in December 2002.Welcome to the unitWe are five cloned female pigs and we were born on Christmas Day 2001.Just call me Noel,OK?I m Angel,in your heartIm your Star.Love me please.Hi!Im Joy.Im happy-go-lucky every day.Im the beautiful MaryWelcome to the unitI am the first cloned monkey and I was born at a research centre in the USA.Welcome to the unitI look just like my brother,thats because I am a clone.The mule in the picture is The mule in the picture is the worldthe world s first cloned s first cloned mule.It was born on 4 May mule.It was born on 4 May 2003.His name is Idaho 2003.His name is Idaho Gem and his brother,Taz,Gem and his brother,Taz,was a racing mule that has was a racing mule that has won many competitions.won many competitions.Welcome to the unitWe are a pair of new born cloned calves from Japan.The pair of calves were born on 5 July 1998 in Ishikawa,Japan.They were two years younger than Dolly,being the second adult animal clones in the world.What do you think of the new kind of technology?Does it have advantages or disadvantages?DiscussionDiscussionFun picturesFun picturesIf cloning goes wrong,what will happen?A dog or an eagle?A duck or a crocodile?A duck or a crocodile?A cock or a dog?A lion or a kangaroo?A frog or a crocodile?A frog or a crocodile?A tortoise or a bear?A bird or a dog?A bird or a dog?Do you think it would be a good idea to clone humans some day?Why or why not?DebateThey shouldnt,forreasons:1.Cloning can help cure many diseases and save a lot of people lives.2.3.Part AThey should,forreasons:1.Cloning can lead to ethical(伦理伦理)problems.2.3.Part BGiving an oral reportToday our class had a discussion about whether the governments should pass laws to prohibit human cloning.Some students think that the governments should,forHowever,some other students think it necessary to prohibit,forIn my opinion,Homework:WritingWrite a short passage(150 words)about cloning and your may start like this:Today our class had a discussion about whether the governments should pass laws to prohibit human cloning.Some students think that the governments shouldnt,forHowever,some other students think it necessary to prohibit,forIn my opinion,Thank you！