Unit9 Reading Club 2 （ppt课件）-2023新北师大版（2019）《高中英语》选择性必修第三册.pptx

1、What do you know about DNA?What is DNA used for?detective:person who looks for clues to understand a problemdatabase:a computer system that holds informationsuspect:someone who is thought to have done a bad thingreconstruct:to make something that was once whole and is now in partsconfirm:to use clue

2、s to say an idea is truecontroversy:an argument that is made of many ideas over a long period of timeWhat can DNA detectives be used to do?To identify genetic information to detect disease and figure out a persons indentity and how people were related.Read the introductory paragraph and answer the q

3、uestion.1.What were the difficulties faced in the first case?2.What have DNA detectives helped to find?The target peoples indentities were unknown.The police and researchers had to search for DNA from relatives of the people to confirm their indentities.Read text 1.Answer the question.The DNA detect

4、ives have helped identify criminals or relationships between people.1.How do the police use the DNA to find suspects and victims?2.How did the police find the killer?They compare the DNA information of the victim or suspect to the information in the database to find the suspect.Read the first text.A

5、nswer the questions.Firstly,they questioned several suspects.Then they found a full DNA profile of the killer from the victims body.They ran 12,000 male names through the database,and they were either witnesses or suspects.Finally,they found the killer whose daughter was arrested for a minor inciden

6、t.3.How long did it take the police to find the killer?It took them 31 years.1.How did the identification of Copernicus begin?2.What did the expert find out about Copernicus?3.How did the experts find genetic material from Copernicus?In 2005,a skull and an incomplete skeleton were found in Frombork,

7、Poland,where Copernicus was buried.Read the second text.Answer the questions.He had a broken nose,blue eyes,and a scar above his left eye.They found nine hairs in the book which he had owned for decades.4.Why do some scientists say that the findings should not be announced so early?They think the te

8、am should have looked more carefully for the DNA from Copernicuss mother or her relatives to check the result.Some people are opposed to using DNA detectives to identify criminals or relationships between people.They think DNA should remain private.What do you think?Use examples to support your ideas.In which other ways can DNA detectives help us?Search online and prepare a summary to share with the class next time.