1、Lets learn the new words蓝图 n.一般的 adj.形式 n.双胞胎之一 n.复杂的 adj.重复v.确认，鉴别 v.有关的 adj.说明 n.孙子，外孙 n.孙女，外孙女n.blueprint generalpatterntwincomplexrepeatidentifyrelatedinstructiongrandsongranddaughterThis is the shape of DNA.Do you think its magic?“DNA”is short for deoxyribonucleic acid.Presentation:This is the
2、shape of DNA.Do you think its magic?“DNA”is short for deoxyribonucleic acid.ListeningListen to the tape twice with the following questions.1.In(),a blueprint is a drawing.2.()some twins,every living thing has its own unique DNA.3.You have your own unique DNA,but it()patterns from your parentsDNA.4.Y
3、our parents and grandparents are()to you.5.Your DNA has()instructions that explain why you are the way you are.generalExcept forrepeatsbillions ofrelated Read the lesson and answer the questions：1.What is a blueprint?2.Which is more complex,building a living thing or building a house?3.Do some twins
4、 have the same DNA?4.Is it possible to change your DNA?5.Whose DNA is related to yours?Read the lesson and answer the questions：1.What is a blueprint?In general,a blueprint is a drawing that showshow to put a house together with manydifferent parts.1.2.Which is more complex,building a living thing o
5、r building a house?2.Building a living thing is far more complexthan building a house.3.Do some twins have the same DNA?Yes,they do.4.Is it possible to change your DNA?Yes,it is.In the future,scientists mightbe able to change our DNA.5.Whose DNA is related to yours?People who are related to me.Forex
6、ample,my parents and grandparents.Language pointsin general 一般而言，通常be born 出生except for 除之外be able to 能够the same as 和一样be related to 与有关one of the adj-est n.(复数)最.之一not onlybut also 不但而且billions of 数十亿的认真研读绩优学案P75重点解读，完成跟踪训练习题。Practice.Fill in the blanks with the phrases in the box.in general,except
7、 for,not onlybut also,relatedto,even if,the sameas 1.Your homework is quite gooda fewspelling mistakes.2.the youngthe old like popmusic.3.Kates hair iscolour her sisters.4.,women live longer than men.5.many difficulties remain,we canovercome them.6.Is wealthhappiness?except forNot onlybut alsothe sa
8、me asIn generalEven ifrelated tohorsedonkeymulepanda+tiger=pangerlion+kangaroo=liongaroocat+snake=catake.Complete the passage with the sentences in the box.Changing DNA Do you know DNA can be changed?Have you ever seen a pig with adogs body?Of course not!Pigs and dogs cant have babies together.But n
9、ow,scientists can do it.Scientists can take DNA from one kind ofanimal and put it into another kind of animal.They can design new plantsby combining the DNA of other plants._Some scientists areworried.They say we need to know more about DNA before we startchanging it.But what if the plants are bad f
10、or humans,too?A.Their DNA cant combine.B.We can make plants that are bad for pests.C.They can even combine the DNA of a plant and an animal.ACB根据汉语意思完成句子，每空一词：1.我们用蓝图建造房子。We _ a blueprint _ _ a house.2.除了窗子小外,这座房子很漂亮。The house is beautiful _ _ the small windows.3.你的头发和皮肤有同样的DNA。Your hair has _ _ _ _ your skin.4.她不但会唱歌，而且会跳舞。She can _ _ sing _ _ dance.use to buildexcept forthe same DNA asnot onlybut alsoHomework
