"Wonderful Cloning" PPT courseware 8

Description

"Wonderful Cloning" PPT courseware 8

learning target

1. Perceive the text as a whole and understand its content.

2. Understand the order and method of explanation used in this article.

3. Cultivate students' ability to collect, filter, and utilize information; cultivate students' perseverance in scientific attitude and scientific spirit of truth-seeking and innovation.

about the author

Tan Jiazhen is a geneticist from Cicheng, Ningbo. In 1980, he was elected as a member of the Chinese Academy of Sciences. In the 1960s and 1970s, he led research on radiation inheritance in macaques, tissue molecular genetics, and plant genetic engineering, all of which achieved important results. He has successively served as vice president of Fudan University, president of the Chinese Genetics Society, editor-in-chief of Acta Genetics, foreign academician of the National Academy of Sciences of the United States and Italy, academician of the Third World Academy of Sciences, and honorary lifetime academician of the New York Academy of Sciences.

Background introduction

In the second half of the 20th century, scientists developed cloning technology, which is to use artificial methods to "create" life. In the 1950s, Chinese scientist Zhu Xi used egg cells to asexually reproduce toads. The toads also reproduced offspring, producing "toads without a grandfather." In 1996, Wilmot and other scholars at the Roslin Institute in Edinburgh, UK, bred the world's first female cloned sheep, Dolly. This sheep is not the product of fertilization between the ewe's egg cells and the ram's sperm cells, but the result of the step-by-step development of "nuclear eggs". The birth of cloned sheep caused a sensation all over the world.

word accumulation

1. Read

reproduction toad crawling

Gonadal secretion blastoembryo stage

On the verge of hatching trypsin

2. Make a note

Reproduce: Gradually increase or expand.

Accept: accept.

Ready: things are arranged properly.

Die young: short life, die young.

Beforehand: beforehand.

Quran: It means unexpected.

Clap the case and applaud: Clap the table and applaud. Very appreciated. Table: Old style long and narrow table.

Vast supernatural powers: Describes great abilities and many methods (mostly derogatory). Supernatural power, religion refers to omnipotent power.

Live in peace with each other: live in peace with each other without conflict.

overall perception

Please summarize "What is cloning" in one sentence?

Initially: cloning is asexual reproduction;

To this day: Any group of individuals derived from an ancestor through asexual reproduction is also called a clone.

Living things that reproduce by dividing themselves in two or expanding a small part of themselves are called asexual reproduction.

collaborative inquiry

1. Skip the text and list examples of cloning

What examples of cloning are mentioned in the text? (Please list them in order)

2. Read the text carefully and explore the content of the text

Read the text to yourself and think about the following questions:

1. In order to explain "what is cloning", what explanation methods does the author use?

Give examples: List biological phenomena that people are familiar with to illustrate, and explain difficult scientific knowledge in a concise and easy-to-understand manner.

Definition: Trace the origin of the word clone and explain it.

Quote: Quoting the story of plucking hair and turning into a monkey in "Journey to the West", vividly explaining it.

2. How was crucian carp cloned? Does the section "before and after the birth of cloned crucian carp" explain the "cloning experiment" in chronological order? What are the benefits of this arrangement?

3. Why did the birth of cloned sheep cause a sensation around the world?

4. What benefits does cloning technology bring to humans?

First, cloning can effectively reproduce “high value-added livestock”;

Second, cloning can be used to save rare animals;

Third, cloning is of great significance to the prevention and treatment of human diseases and the extension of life span.

4. Study the text and study the title of the article

What is the purpose of using subtitles in texts?

The text uses subtitles to make the full text content hierarchical and clear. The subtitle succinctly summarizes the content of this part, and also allows the article to omit transitional references.

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"Wonderful Cloning" PPT teaching courseware:

Contents of the first part of the "Wonderful Cloning" PPT teaching courseware: Text introduction More than ten years ago, many Chinese media reprinted a shocking news reported by foreign media: a group of scientific madmen controlled by a cult organization were carrying out a conspiracy deep in the desert of Nevada, USA. With one item...

"Wonderful Cloning" PPT download:

"Wonderful Cloning" PPT Download Part One: Learning Objectives 1. Clarify the structure of the text and understand the content of the article. 2. Understand the order and method of explanation used in this article. 3. Cultivate a persevering scientific attitude and a scientific spirit of truth-seeking and innovation. Get closer to the author Tan Jiazhen...

"Wonderful Cloning" PPT:

"Wonderful Cloning" PPT Part One: Classroom Introduction Tan Jiazhen (1909.9-2008.11), academician of the Chinese Academy of Sciences, geneticist, and educator. He has been engaged in teaching and researching genetics for more than 70 years, and has taught general biology and comparative anatomy of vertebrates.

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Update Time: 2024-10-15

This template belongs to Chinese courseware Lu Jiao edition seventh grade Chinese language volume 2 industry PPT template

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