People's Education Edition Biology for Grade 8, Volume 1
People's Education Edition Biology for Grade 8, Volume 2
People's Education Press High School Biology Compulsory Course 2
Beijing Normal University Edition Seventh Grade Biology Volume 2
People's Education Edition seventh grade biology volume 1
Beijing Normal University Edition Eighth Grade Biology Volume 1
Beijing Normal University Edition Seventh Grade Biology Volume 1
People's Education Press seventh grade biology book volume 2
Beijing Normal University Edition Eighth Grade Biology Volume 2
High School Biology Compulsory Course 1, published by People's Education Press
Jiangsu Education Edition 8th Grade Biology Volume 1
Jiangsu Education Edition Seventh Grade Biology Volume 1
Jiangsu Education Edition Seventh Grade Biology Volume 2
Jiangsu Education Edition 8th Grade Biology Volume 2
!["Genes Control Biological Traits" Biological Inheritance and Variation PPT Courseware 6](http://daogebangong.oss-cn-beijing.aliyuncs.com/ppt/preview/1/64b0e1cf-ccb3-4640-8642-bf79eb5b738c.webp)
Category | Format | Size |
---|---|---|
People's Education Edition Biology for Grade 8, Volume 2 | pptx | 6 MB |
Description
"Genes Control Biological Traits" Biological Inheritance and Variation PPT Courseware 6
1. What is heredity?
The phenomenon of biological traits being passed on to future generations is called heredity.
2. What is mutation?
The differences in traits between parents and offspring of organisms, as well as between individuals of offspring, are called variations.
Biological inheritance and variation are achieved through reproduction and development.
Observe yourself or your classmates:
Are there earlobes?
Is it a single eyelid or a double eyelid?
Can you curl your tongue from both sides to the center?
Can you bend your thumb dorsally?
1. Can you know all of your traits just by visual observation or simple measurements?
You cannot know all your traits. The naked eye can only observe certain morphological structures and behavioral characteristics, but cannot observe the physiological characteristics of organisms.
2. Give examples of the different manifestations of the same trait in the same species of organisms.
For example, the color of roses is the same shape, with different manifestations, such as red, white, yellow, etc.; there are also organisms that have the same trait in only two manifestations, such as pea seeds that are only round or wrinkled.
3. Choose any of the above human traits and see if they are the same as your parents. If they are different, see if they are the same as your parents' parents? What is this indicating?
Identical to a parent or a parent's parent, indicating that these traits are heritable.
4. Are all traits of organisms heritable? If not, please give an example and try to explain.
no. For example, in areas with sufficient water and fertilizer in wheat fields, wheat seedlings are thicker than normal. This trait difference is due to variation caused by changes in environmental conditions, and does not involve changes in genetic material, and is not heritable.
The concept of traits:
The morphological structure, physiological characteristics and behavioral characteristics of organisms are collectively called traits.
The concept of relative traits:
Different manifestations of the same trait in the same organism are called relative traits.
Consolidation exercises:
1. "If you sow melons, you will get melons; if you sow beans, you will get beans." "One mother gives birth to nine sons, and even the mother has ten sons." This shows that ( ) is common in nature.
A Reproductive and developmental phenomena B Evolutionary phenomena
C Heredity and mutation phenomena D Supernatural phenomena
2. Characteristics refer to ( )
A The shape of the organism B The sex of the organism
C Morphological characteristics, physiological characteristics and behavioral patterns of organisms, etc.
D size of organism
3. Which of the following traits cannot be inherited ( )
A A sighted couple gives birth to a color-blind son
B The fur colors of rabbits include white, black, etc.
C Individual albino seedlings often appear in corn fields
D People who often work in the field have darkened skin
4. Heredity refers to _________ between parents and children, variation refers to _________ between parents and offspring individuals, and biological inheritance and variation are achieved through _________.
5. Xiaohong’s mother has double eyelids, has earlobes, and her thumbs are bent dorsally; her father has single eyelids, has earlobes, and his thumbs cannot bend dorsally; Xiaohong has double eyelids, has no earlobes, and his thumbs cannot bend dorsally. Please analyze based on the above information:
The mother has double eyelids, and Xiaohong also has double eyelids, which illustrates the biological _________ phenomenon.
Both parents have earlobes, but Xiaohong has no earlobes, which illustrates the biological ________ phenomenon.
There are ________ pairs of relative traits, which are ______________, ______________, and ______________.
GM technology:
By transferring a gene from one organism into the genome of another organism using biotechnological methods, the resulting genetically modified organism may exhibit the traits controlled by the inserted gene.
This is genetically modified technology.
application:
Genetically modified crops, genetically modified animals, genetically modified foods, genetically modified drugs, etc.
Consolidation exercises:
1. In the study of genetically modified super mice, what is being studied is _____. The super mice born in one litter are large in size, while ordinary mice are small in size. This is a pair of _____, and the gene that controls this trait is _____.
2. In the process of biological transmission, _____ is passed on, not _____.
3. The relationship between traits and genes is _____.
4. At present, the applications of genetically modified technology include _____, _____, _____, _____.
practise
1. Think about it, which of the following statements are correct? What's wrong? Why?
(1) For the same mature fish, carp is larger and crucian carp is smaller. This is a relative trait.
(2) Goldfish have transparent and opaque body colors, which are relative traits.
(3) The surface of plum fruit is smooth, while the surface of peach fruit is either smooth or hairy. They can be called relative traits to each other.
(4) The wounds of hemophilia patients are not easy to coagulate when bleeding. This situation may also appear in their offspring. This is a trait controlled by genes.
(1)(3) is incorrect. Relative traits refer to different manifestations of the same trait in the same species of organisms, such as double eyelids and single eyelids in humans, red and pink colors of roses, etc.
(2 pairs. (4) Yes. Traits controlled by genes are heritable.
(5) Wheat grains on the same ear are planted in fertile soil and poor soil respectively. The former is larger than the latter. This is because the genes that control the size of wheat grains have changed.
(5) Wrong. Different environmental conditions can cause differences in traits. For example, some recessive genes in corn (for example, one pair is aa) prevent the formation of chloroplasts in the leaves, resulting in albino seedlings. Its dominant gene A controls the formation of chloroplasts. If a seed with the AA gene germinates in a dark place without light, the seedlings will be albino; if they germinate under light, the seedlings will be green. It can be seen that individuals with the same genotype can develop different phenotypes under different conditions.
Keywords: teaching courseware of inheritance and variation of organisms, teaching courseware of traits controlled by genes, new PEP eighth grade biology PPT courseware for the second volume, eighth grade biology slide courseware download, download of inheritance and variation of organisms PPT courseware, gene control Biological traits PPT courseware download, .ppt format
For more information about the PPT courseware "Heredity and Variation of Organisms, Genes Control the Characteristics of Organisms", please click the Inheritance and Variation of Organisms ppt, Genes Control the Characteristics of Organisms ppt tag.
"Genes Control Biological Traits" Biological Inheritance and Variation PPT Courseware 7:
"Genes Control Biological Characteristics" Biological Inheritance and Variation PPT Courseware 7 Test You What is the relationship between individual animals in this set of pictures you see? Are each of their children similar to their parents? Is it exactly the same? Why do I look like my parents but not like them at the same time?
"Genes Control Biological Traits" Biological Inheritance and Variation PPT Courseware 5:
"Genes Control Biological Traits" Biological Inheritance and Variation PPT Courseware 5 Read and think about the following questions. Mark them in the text: What is heredity? What is mutation? How are biological inheritance and mutations achieved? What is a trait? What is relativity...
"Genes Control Biological Traits" Biological Inheritance and Variation PPT Courseware 4:
"Genes Control Biological Traits" Biological Inheritance and Variation PPT Courseware 4 Learning Objectives: 1. Give examples of biological traits and the continuation of traits between parent and offspring. Give examples of the differences between different traits and relative traits. 2. Give examples of biological...
File Info
Update Time: 2024-09-06
This template belongs to biology courseware People's Education Edition Biology for Grade 8, Volume 2 industry PPT template
"Genes Control Biological Traits" Biological Inheritance and Variation PPT Courseware 6 Simple campus recruitment activity planning plan summary enterprise and institution recruitment publicity lecture PPT template is a general PPT template for business post competition provided by the manuscript PPT, simple campus recruitment activity planning plan summary enterprise and institution recruitment promotion Lecture PPT template, you can edit and modify the text and pictures in the source file by downloading the source file. If you want more exquisite business PPT templates, you can come to grid resource. Doug resource PPT, massive PPT template slide material download, we only make high-quality PPT templates!
Tips: If you open the template and feel that it is not suitable for all your needs, you can search for related content "Genes Control Biological Traits" Biological Inheritance and Variation PPT Courseware 6 is enough.
How to use the Windows system template
Directly decompress the file and use it with office or wps
How to use the Mac system template
Directly decompress the file and use it Office or wps can be used
Related reading
For more detailed PPT-related tutorials and font tutorials, you can view: Click to see
How to create a high-quality technological sense PPT? 4 ways to share the bottom of the box
Notice
Do not download in WeChat, Zhihu, QQ, built-in browsers, please use mobile browsers to download! If you are a mobile phone user, please download it on your computer!
1. The manuscript PPT is only for study and reference, please delete it 24 hours after downloading.
2. If the resource involves your legitimate rights and interests, delete it immediately.
3. Contact information: service@daogebangong.com
"Genes Control Biological Traits" Biological Inheritance and Variation PPT Courseware 6, due to usage restrictions, it is only for personal study and reference use. For commercial use, please go to the relevant official website for authorization.
(Personal non-commercial use refers to the use of this font to complete the display of personal works, including but not limited to the design of personal papers, resumes, etc.)
Preview
!["Genes Control Biological Traits" Biological Inheritance and Variation PPT Courseware 6](http://daogebangong.oss-cn-beijing.aliyuncs.com/ppt/preview/1/90ded4c1-0c44-446e-81fd-80dae12b64c1.webp)