High School Biology Hereditary Mutation
The following are some questions about hereditary mutations in high school organisms: ** 1. Multiple choice questions ** 1. Among the following related traits, the relative traits are () - A. The white of the pea seed coat and the green of the pod - B. The white hair of sheep and the brown hair of horse - C. The Red Eyes and Rod Eyes of the Fruit Fly - D. The albinism and normalcy of human skin color 2. The following description of biological mutation is correct () - A. The hereditary mutations of prokaryota include gene mutation, gene reorganization, and aberrations - B. A change in the base sequence of a gene does not necessarily lead to a change in the trait - C. Self-breeding of organisms with the Aa gene type, resulting in new traits appearing in the offspring due to genetic reorganization. - D. Genetic reassortment is the fundamental source of biological mutation 3. There are always some differences in traits between siblings. This variation mainly comes from () - A. gene mutation - B. genetic recombination - C. gene isolation - D. chromosome variation ** 2. Short Answer Questions ** 1. Breeding experts found a very rare "one stalk and two ears" plant in the rice field. It was identified that the mutated trait was caused by genetic mutation. - (1) Is this phenomenon caused by the mutation of dominant genes into recessionary genes? - (2) Can the mutated plant produce a pure mutant with this mutated trait? - (3) Can the location of gene mutation be determined by observing the shape of the mitotic mid-phase of the cell? - (4) Can a high-yield strain with stable inheritance be obtained after the pollen of this rice plant is cultured? 2. The mutations that can occur during mitosis and Meiosis are (multiple choices)() - A. The addition, loss, or change of base pairs during DNA replication, resulting in genetic mutation. - B. The free combination between non-homolog genes leads to genetic reorganization. - C. The exchange of a fragment between non-homolog genes leads to a mutation in the structure of the genes. - D. The two nuclei formed after the kinetochore split cannot move to the poles, resulting in a variation in the number of nuclei. 3. The human body's thyreoid-like cells had a very strong ability to take in iodines. Clinically, small doses of radioactive 131I are often used to treat certain diseases of the gland, but large doses of 131I can have harmful effects on the human body. The 131I accumulated in the cells may directly () - A. The inserted DNA molecules cause the bases behind the inserted point to cause genetic mutations. - B. Replacing a base in the DNA molecules causes genetic mutation - C. Cause structural mutations such as breaks, loss, or translocations - D. Inducing a genetic mutation in the folicular cells of the thyreoid and passing it on to the next generation 4. In order to solve the problem of the loss of meat quality of ordinary diploids due to the laying of eggs in summer, triploids were bred. The reasonable method to cultivate triploids from ordinary oyster is () - A. Water pressure is used to suppress the first cleavage of the fertilized egg, and then a new individual is cultivated. - B. Using sperm that had their nuclei destroyed by gamma-rays to stimulate egg cells, and then nurturing them into new individuals. - C. The nucleus of an early embryonic cell is implanted into an enuculated egg cell and then cultivated to form a new individual. - D. Using chemicals to prevent the secondary ovaries from releasing polar bodies after fertilisation, and then nurturing them into new individuals. 5. There were currently three tomato varieties. The A variety had the gene type of AAbBdd, the B variety had the gene type of AAbbdd, and the C variety had the gene type of aaBBdd. The three pairs of genes were located on the three pairs of homolog genes and controlled the three pairs of traits of leaf shape, flower color, and fruit shape respectively. Please answer the relevant genetic questions (such as questions about the hereditary variation of the crossbred offspring, such as the gene type, the expression type, and the proportion). Read more exciting novels for free
The Teaching Design Case of Mutation Breeding and Evolution in High School Biology
The following is a teaching design case of high school biological mutation breeding and evolution: ##1. Teaching objectives 1. ** Knowledge target ** - Students will be able to understand the types, structures, and characteristics of genetic mutations, the types of aberrations, and their applications in breeding, as well as the principles and characteristics of various breeding methods. - Master the main points of modern biological evolution theory and understand the comparison between natural selection theory and modern biological evolution theory. 2. ** Ability Target ** - Able to apply the breeding process to the experimental design of biological breeding. - He learned how to build a knowledge network and form his own knowledge system with the knowledge of mutation breeding and evolution. 3. ** Emotional goal ** - Through understanding the application of mutation breeding and evolution knowledge in life, students could experience the practicality of biology and stimulate their interest in biology. ##2. Difficulties in Teaching 1. ** Main point ** - Distinguish three types of hereditary mutations (gene mutation, gene reorganization, and aberrations). - Master the breeding process and be able to carry out relevant experimental design. - Deep understanding of modern biological evolution theory. 2. ** Difficulty ** - Understand the essential differences and connections between the three types of hereditary mutations. - The complicated links in the breeding process and the construction of experimental design ideas. - In modern biological evolution theory, there were abstract concepts such as the calculation of gene frequency. ##3. Teaching Method Teaching method, discussion method, question guidance method, and case analysis method. ##4. Teaching process ###(1) Introduction (5 minutes) By showing some pictures of creatures with obvious differences in traits (such as flowers of different colors, fruits of different shapes, etc.), ask the students how these differences in traits arise, guide the students to think about the concept of mutation, and then lead to the topic of mutation breeding and evolution in this lesson. ###(2) Knowledge explanation (25 minutes) 1. ** Mutated Part ** - gene mutation - Explain the molecular mechanism of genetic mutation, including mitosis, protocaryote fission, and viral DNA replication. It emphasized that gene mutation did not change the number of genes, but only the structure of genes. It explained the impact of gene mutation on traits through examples (such as sickle cell leukemia), including changing biological traits and not changing biological traits. At the same time, the characteristics of gene mutation and the relationship between its advantages and disadvantages and the environment were described. - Illustrate the types of genetic mutations (dominant and latent) and their patterns of expression. - genetic recombination - This paper introduced the concept of gene reorganization from both narrow and broad perspectives, focusing on the free combination of non-allele-like genes on non-homolog and the cross-exchange of non-sister chromatids on homolog during the process of Meiosis. The process of gene reorganization was analyzed through cell division diagrams. Students were asked to discuss the differences between gene reorganization and gene mutation in producing new traits. - chromosome variation - They introduced the types of structural aberrations (loss, repetition, reversal, and translocations) and numerical aberrations (euploids and aneuploids). Through examples (such as the polyploids of some plants), explain the application principle of mutation in breeding. For example, polyploids can increase crop yield and improve quality. 2. ** Breeding Part ** - The more common breeding methods (mutation breeding, cross breeding, haploid breeding, polyploid breeding, genetic engineering breeding, etc.) were explained in terms of breeding principles, methods, advantages, disadvantages, and scope of application. For example, mutation breeding could produce new genes and create new types of mutations, but the frequency of mutation was low and the direction was difficult to control. Crossbreeding could not produce new genes, but it was only a combination of original genes, but the operation was relatively simple. - Give some practical breeding problems, let the students discuss in groups and choose the appropriate breeding method, such as which breeding method should be chosen to obtain a pure spore in a short period of time, etc., to train the students 'ability to use knowledge to solve practical problems. 3. ** Evolution Part ** - This paper introduced the main contents of Darwinian theory of natural selection (over-reproduction, struggle for survival, genetic variation, survival of the fittest), and analyzed its contributions and limitations. - The main points of modern biological evolution theory were elaborated, including population as the basic unit of biological evolution, the concept of gene frequency and its calculation method, the raw materials for evolution produced by mutation and gene reorganization, the direction of biological evolution determined by natural selection, isolation as a necessary condition for speciation, etc. Help students understand modern evolutionary theories through examples, such as the formation of different ground finches on the Galapagos Islands. ###(3) Class interaction (15 minutes) 1. ** Group discussion ** - Give some controversial questions, such as "Is GM food safe?" and let the students discuss in groups. Each group would elect a representative to explain the group's views, and the other groups could ask questions and refute. The teacher patrolled the students during the discussion and guided the students to think about the problem from the perspective of mutation breeding and evolution. 2. ** Question and Answer ** - Students were encouraged to ask questions that they had encountered in the learning process. Teachers would provide detailed answers to students 'questions and focus on some common problems, such as common errors in gene frequency calculation. ###(4) Class summary (10 minutes) 1. Guide the students to review the main knowledge points of mutation breeding and evolution learned in this lesson, including the types of mutation, the comparison of breeding methods, the main points of modern biological evolution theory, etc. 2. Students were required to construct a simple knowledge network, linking the knowledge of mutation, breeding, and evolution. Teachers would select some of the students 'works to display and comment on, further strengthening the students' overall grasp of knowledge. ###(5) Class Practice (10 minutes) Some practice questions related to the content of this lesson were distributed, including multiple-choice questions, fill-in-the-blanks questions, and short-answer questions. Students could complete them independently in class. The practice questions should cover knowledge points such as gene mutation, gene reorganization, aberration variation, breeding method selection, modern biological evolution theory, etc. Through practice, the students should consolidate the knowledge they have learned in time. The teacher should check and feedback the students 'practice situation, and provide individual guidance for the students' problems. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
High School Biology Gene Mutation Breeding Knowledge Points List
|knowledge points| particulars| |--|--| |The molecular mechanism of gene mutation| Genetic mutation can occur during amitosis, protocaryote fission, and viral DNA replication. Genetic mutation does not change the number of genes, but only the structure (from A→a or a→A, the essential difference between A and a is the change in the molecular structure of genes, namely the type, quantity, and order of the deoxynotides)| |gene mutation types| Dominant mutation (such as a→A, the mutation will show the trait); Recessive mutation (such as A→a, the mutant trait can be stably inherited after it is shown)| |The effect of gene mutation on traits| Change biological traits (mutation causes changes in codons, causing changes in protein functions, such as sickle cell leukemia); do not change biological traits (Soma cell genes may not change in reproductive cells, parent DNA base pair changes will produce hidden genes that are passed on to offspring, and the hidden traits will not appear when the offspring are mixed. Codon degeneracy may translate into the same aa, traits are affected by genes and environment, and in some environments, genetic changes will not appear.)| |The pros and cons of genetic mutation| The pros and cons depend on the living environment, and some are both harmless and useless.| |The probability of genetic mutation in cells| Germinal cells> Soma cells, cells with vigorous division> cells that have stopped dividing| |Requirements for Mutation Breeding Materials| Materials that can undergo cell division (such as germinated seeds, mice, etc.) meet the requirements, while materials that do not undergo cell division (such as dried seeds, animal sperm, etc.) do not meet the requirements.| |Genetic Reassembly| In the narrow sense, gene reorganization refers to the free combination of non-allelic genes on non-homological embryos and the cross-exchange of non-sister chromatids on homological embryos during the process of Meiosis. In the broad sense, it also includes genetic material changes caused by genetic engineering and plant somatic-cell hybrids. The different causes of B and B in the picture include gene mutation (interphase) or cross-exchange (prophase). When asking the root cause, consider gene mutation. If there is a hint of division, judge according to the hint.| |Comparisons of Chromatic Mutations and Other Mutations| (Not explicitly mentioned in comparison, temporarily omitted)| |Comparisons of Common Breeding Methods| (Not explicitly mentioned in comparison, temporarily omitted)| |Selection of breeding methods| Mutation breeding can produce new genes, but cross-breeding cannot, but it can realize gene reassembly. The simplest and most conventional breeding method is cross-breeding. Cross-breeding is used to concentrate the good traits of two parents; Haploids are used for rapid breeding; Mutation breeding is used to greatly improve varieties; Polyploids are used to increase yield and nutrient content; The time of cross-breeding is F2; There are differences in the method of obtaining pure mutants in animal and plant cross-breeding (self-breeding in plants and test-crossing in animals).| |Human genetic diseases| It can be judged by the typical chart. The pedigree chart can be used to determine whether it is inherited with Y (if the patient is all male, it may be inherited with Y)(Other judgment contents are not completely mentioned, temporarily omitted)| <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
High school biology, gene, digital mutation, teaching plan and reflection, how to write
Biology High School Information
The following is a summary of the high school biology information: 1. ** Life System and Cell ** - The structure of a living system was divided into cells, tissues, organs, systems, individuals, populations, communities, and ecological systems. The cell was the basic unit of a living organism's structure and function, and it was also the most basic living system on Earth. - The fundamental difference between a procaryotic cell and a eukaryotic cell was the existence of a nucleus with or without a nuclear membrane. Prokaryonic cells have no nuclear membrane and no chopsticks, such as bacteria such as E. Coli and cyanophagia; Eukaryotic cells have nuclear membrane and chopsticks, such as yeast and so on. Viruses have no cell structure, but they have DNA or DNA. - The founders of the cell theory were Schleiden and Schwann, who revealed the unity of cells and the unity of biological structures. 2. ** Elements and compounds in cells ** - The types of chemical elements that make up cells (biological world) are roughly the same as those in the organic world, but the contents are different. The major elements in the cells were C, H, O, N, P, S, K, Ka, and MG; the trace elements were iron, Mn, B, Mn, Mo, and copper; the main elements were C, H, O, N, P, and S; and the basic element was C. The most abundant element in the dry weight of the cells was C, and the most abundant element in the fresh weight was O. - The most abundant compound in the fresh weight of the organism was water, and the most abundant compound in the dry weight was protein. Reducting sugar (glucose, glucose, glucose) can react with Fehling's reagent to form a brick-red deposit; fat can be dyed orange by Sultan III (or red by Sultan IV); starch will turn blue when it comes into contact with iodines; and protein will react with biuret reagent to produce a purple reaction. - Polymers, protein, and nuclei were biological molecules, and their components were, in turn, monocosomes, followed by monocosomes, and then monocosomes, followed by monocosomes, and then monocosomes. 3. ** Cell structure and function ** - The operation steps of the optical microscope were to focus the light → observe with a low-power objective lens → move the center of the field of view (move it to the side) → observe with a high-power objective lens (you can only adjust the fine focal spiral, adjust the large aperture, and adjust the concave mirror). - Eukaryotic organelle had different functions and structures. For example, mitochondria and plastids had their own characteristics, and they had something in common. Prokaryotic cells and eukaryotic cells had cell membranes and plastids, which reflected unity. - There were specific changes in the DNA in the nucleus during mitosis, and there were different sources and destinations of ATP. 4. ** Photosynthesis and Breathing ** - The light reaction and dark reaction in photosynthesis could be compared. At the same time, the relationship between light energy utilization rate and photosynthesis efficiency should be clarified, as well as the relationship between external factors affecting photosynthesis and improving light energy utilization rate. - The process of cell breathing involved the metabolism of the three major nutrients in human and animal bodies. 5. ** Genetic Information ** - The carriers of genetic information were the nuclei, including DNA and R A. They played an important role in genetic variation and protein synthesis. There were differences in distribution, dyeing agents, chain number, bases, pentasugar, composition units, and representative organisms. - The basic unit of a protein was an aa. The R groups of different aa in the general structural formula were different. The aa formed a peptidic bond through dehydration condensation to form a peptidic chain. The protein's variety stemmed from the differences in the type, number, and order of aa, as well as the folding method of the peptidic chain. The protein had the functions of structural protein, catalyst, transportation carrier, information transmission, immunity, and so on. 6. ** Other aspects of living beings ** - In biological tissues, reducing sugar, fat, protein, and DNA could be identified, but sugar cane could not be used as the reducing sugar identification material. The Fehling reagent had to be prepared and used immediately (different from the biuret reagent). - In an ecosystem, the stability of resistance and the stability of resilience were not absolutely inverse. There were special situations such as the Arctic tundra. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Luohe High School Biology Training School
In the reference materials, it was mentioned that the address of Luohe Jinxiu Qiancheng School was on the second floor of Shijifeng Lifestyle Supermarket (Liaohe Road Store) in Luohe Licheng District, and Bohang Education School was located in Luohe E-commerce Secondary Professional School (North Campus) in Luohe Yuanhui District. However, he was not sure if these two schools were specialized high school biology training schools. He only knew that these two schools were recruiting high school biology teachers. The address of other Luohe High School Biology Training School was not mentioned in the reference materials, so I can't give an accurate answer. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Biology essay, junior high school
Biology was a subject that studied life phenomena and the composition, structure, function, growth, development, reproduction, and so on. It was one of the branches of the natural sciences and was closely related to chemistry, physics, mathematics and other disciplines. The research content of biology was very broad, including cell biology, molecular biology, ecology, genetics, developmental biology, biochemistry, and so on. Through the study of biology, we can understand the origin and evolution of life, the structure and function of living things, the relationship between living things and environmental factors, the adaptability and variety of living things, and so on. Biology is also widely used, not only to help us better understand nature, but also to provide scientific basis for many fields such as medicine, agriculture, environmental protection, biotechnology and so on. For example, biological research in the field of medicine can help us better understand the origin and mechanism of diseases and better treat patients; biological research in the field of environmental protection can help us better understand the functions and mechanisms of the ecosystem and better protect the environment. Biology is a very important subject. It can not only help us better understand nature, but also provide scientific basis and solutions to practical problems in many fields. We should strengthen the study of biology to better protect nature and contribute to the future development of mankind.
How to memorize high school biology
Junior high school biology cartoon
High School Biology Cystic Fibers
Cystic fiber disease was an autosomal-type hereditary disease caused by a genetic mutation. The onset of the disease was due to a mutation in the CP gene located on the seventh pair of the human's body. In the human population, the number of newborns who were heterocarriers of the gene accounted for 2% to 5%, and one in every 2000 to 2500 newborns had the disease. Cystic fiber disease mainly affects the respiratory system and is manifested by repeated bronchi infection and obstruction of the airways. Newborn babies may develop symptoms within a few days of birth, with mild cough in the early stages, followed by pneumonias, atelectasis, breathlessness, and even death. Even if they survive to adulthood, they are often accompanied by chronic lung diseases such as bronchiectasis and lung pus, until the lungs develop extensive inflammation and emphysis, sometimes accompanied by spontaneous pneumothorax or mediastinal emphysis. In the digestive tract, it would prevent the digestive tract from reaching the digestive tract, thus hindering the digestion and absorption of food. From the perspective of pathological mechanism, the regulation of the patient's epidermal cell's Cl-channel was defective, and the water and solute transport across the membrane of the respiratory tract was hindered, which increased the content of acidic gly protein in the secretion of the mucus gland, which would cause the sweat and respiratory secretions to become sticky. For example, when the patient was active, the sweat would be so sticky that it would stick to the clothes like glue, and it would be difficult to cough up the phlegm when coughing. Clinically, for lung infection in patients with congenital flew, they could use antibiotics against sensitive bacteria, use bronchiodilators to maintain the opening of the airways and remove sticky secretions. In terms of digestive tract effects, the patient should be supplemented with high-energy nutrients, fat-dissolved vitamins, and intestinal coating of the digestive tract. In the prevention stage, exercise and home-based respiratory care were more effective methods. In addition, the new drug ivacaftor developed in Europe and the United States could reactivate the function of the experimental lithium channel in the cultured cells at the genetic level, which could improve a variety of clinical symptoms and reduce the risk of chronic and worsening lung diseases. However, the long-term efficacy and safety remained to be seen. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
What is a species in high school biology?
In high school biology, a population referred to all the individuals of the same species in a certain natural area. For example, all the macaques in a forest or all the dandelions in a grassland would form a population. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>