CBSE Class 12 Biology Syllabus 2020-21: Biology is one of the most important subjects for CBSE Class 12 Board Exams, as this helps in the preparation of NEET too. CBSE Class 12 Biology Syllabus helps us to know about the important topics and overview of the subject.
If you are preparing for the Class 12 Biology Exam and in search of the latest CBSE Syllabus for Class 12, then Don’t worry! you are landed in the right place. Here, in this article on CBSE Class 12 Biology Syllabus.
You can easily check the CBSE Class 12 Biology syllabus and download PDF from the article below.
Table of Contents
Latest CBSE Class 12 Biology Syllabus 2020-21 PDF
Biology is an important subject for CBSE Science Stream. It is an essential subject for those students who want to pursue a Medical, Biotechnology, Biomedical Engineering, etc. degree.
You should have an in-depth concept about the CBSE Class 12 Biology Syllabus to score better marks in the CBSE 12th Board exam. As with better clearance of concepts of the latest syllabus, you can secure good marks.
You already know CBSE updates about CBSE Class 12 Syllabus and Exam pattern, almost every year there will be a slight change in the paper pattern and syllabus. Here you can check CBSE new exam pattern for the Class 12 Biology and Marking Scheme
Download CBSE Class 12 Biology Syllabus PDF
Revised CBSE Class 12 Biology Syllabus (After 30% Reduction)
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NEW CBSE Class 12 Biology Syllabus 2020-21
CBSE Class 12 Biology Syllabus 2020-21 Unit-VI Reproduction
Chapter-2: Sexual Reproduction in Flowering Plants
- Flower structure; development of male and female gametophytes; pollination – types, agencies, and examples; outbreeding devices; pollen-pistil interaction; double fertilization; post-fertilization events – development of endosperm and embryo, development of seed and formation of fruit; special modes- apomixis, parthenocarpy, polyembryony; Significance of seed dispersal and fruit
Chapter-3: Human Reproduction
- Male and female reproductive systems; microscopic anatomy of testis and ovary; gametogenesis – spermatogenesis and oogenesis; menstrual cycle; fertilization, embryo development up to blastocyst formation, implantation; pregnancy and placenta formation (Elementary idea); parturition (elementary idea); lactation (elementary idea).
Chapter-4: Reproductive Health
- Need for reproductive health and prevention of Sexually Transmitted Diseases (STDs); birth control – need and methods, contraception and medical termination of pregnancy (MTP); amniocentesis; infertility and assisted reproductive technologies – IVF, ZIFT, GIFT (Elementary idea for general awareness).
CBSE Class 12 Biology Syllabus 2020-21 Unit-VII Genetics and Evolution
Chapter-5: Principles of Inheritance and Variation
- Heredity and variation: Mendelian inheritance; deviations from Mendelism – incomplete dominance, co-dominance, multiple alleles and inheritance of blood groups, pleiotropy; elementary idea of polygenic inheritance; chromosome theory of inheritance; chromosomes and genes; Sex determination – in human being, birds, and honey bee; linkage and crossing over; sex-linked inheritance – hemophilia, color blindness; Mendelian disorders in humans -thalassemia; chromosomal disorders in humans; Down’s syndrome, Turner’s and Klinefelter’s syndromes.
Chapter-6: Molecular Basis of Inheritance
- Search for genetic material and DNA as genetic material; Structure of DNA and RNA; DNA packaging; DNA replication; Central Dogma; transcription, genetic code, translation; gene expression and regulation – lac operon; Genome, Human and rice genome projects; DNA fingerprinting.
CBSE Class 12 Biology Syllabus 2020-21 Unit-VIII Biology and Human Welfare
Chapter-8: Human Health and Diseases
- Pathogens; parasites causing human diseases (malaria, dengue, chikungunya, filariasis, ascariasis, typhoid, pneumonia, common cold, amoebiasis, ringworm) and their control; Basic concepts of immunology – vaccines; cancer, HIV and AIDS; Adolescence – drug and alcohol abuse.
Chapter-10: Microbes in Human Welfare
- Microbes in food processing, industrial production, sewage treatment, energy generation, and microbes as bio-control agents and bio-fertilizers. Antibiotics; production and judicious use.
CBSE Class 12 Biology Syllabus 2020-21 Unit-IX Biotechnology and its Applications
Chapter-11: Biotechnology – Principles and Processes
- Genetic Engineering (Recombinant DNA Technology).
Chapter-12: Biotechnology and its Application
- Application of biotechnology in health and agriculture: Human insulin and vaccine production, stem cell technology, gene therapy; genetically modified organisms – Bt crops; transgenic animals; biosafety issues, biopiracy, and patents.
CBSE Class 12 Biology Syllabus 2020-21 Unit-X Ecology and Environment
Chapter-13: Organisms and Populations
- Organisms and environment: Habitat and niche, population and ecological adaptations; population interactions – mutualism, competition, predation, parasitism; population attributes – growth, birth rate, and death rate, age distribution.
Chapter-15: Biodiversity and its Conservation
- Biodiversity – Concept, patterns, importance; loss of biodiversity; biodiversity conservation; hotspots, endangered organisms, extinction, Red Data Book, Sacred Groves, biosphere reserves, national parks, wildlife, sanctuaries, and Ramsar sites.
CBSE Class 12 Biology Syllabus 2020-21 CBSE 12th Biology Practical Syllabus
List of Experiments
- Prepare a temporary mount to observe pollen
- Collect and study soil from at least two different sites and study them for texture, moisture content, pH, and water holding capacity. Correlate with the kinds of plants found in
- Collect water from two different water bodies around you and study them for pH, clarity, and presence of any living
- Prepare a temporary mount of the onion root tip to study
- Study the effect of different temperatures or three different pH on the activity of salivary amylase on
- Isolate DNA from available plant material such as spinach, green pea seeds, papaya,
Study/observation of the following (Spotting)
- Flowers adapted to pollination by different agencies (wind, insects, birds).
- Identification of stages of gamete development, i.e., T.S. of testis and T.S. of ovary through permanent slides (from grasshopper/mice).
- Meiosis in onion bud cell or grasshopper testis through permanent
- S. of blastula through permanent slides (Mammalian).
- Prepared pedigree charts of any one of the genetic traits such as rolling of tongue, blood groups, ear lobes, widow’s peak, and color
- Common disease-causing organisms like Ascaris, Entamoeba, Plasmodium, any fungus causing ringworm through permanent slides, models, or virtual images. Comment on symptoms of diseases that they
- Two plants and two animals (models/virtual images) found in xeric conditions. Comment upon their morphological adaptations.
- Two plants and two animals (models/virtual images) found in aquatic conditions. Comment upon their morphological
Important Links Related to CBSE 12th Biology
Deleted CBSE 12th Biology Syllabus 2020-21 PDF
CBSE Class 12 Biology Syllabus 2020-21 Unit-VI ReproductionChapter-1: Reproduction in Organism
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CBSE Class 12 Biology Syllabus 2020-21 Unit-VII Genetics and EvolutionChapter-7: Evolution
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CBSE Class 12 Biology Syllabus 2020-21 Unit-VIII Biology and Human WelfareChapter 9: Strategies for Enhancement in Food Production
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CBSE Class 12 Biology Syllabus 2020-21 Under Unit-X Ecology and EnvironmentChapter-14: Ecosystem
Chapter 16: Environmental Issues
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CBSE 12th Biology Practical Syllabus 2020-21(Deleted)
Here you can check the deleted CBSE Class 12 Biology Syllabus 2020-21
A: List of Experiments
B. Study/Observer of the following (spotting)
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CBSE Class 12 Biology Exam Pattern 2020-21 & Marking Scheme
Class 12 Biology Exam patten Comprises of both theory and Practical marks
- Theoretical Paper: 70 marks
- Practical/ Project Work: 30 Marks
CBSE Class 12 Biology Question Paper Pattern 2020-21:
Time Duration |
3 Hours |
Maximum Marks |
70 marks |
Total No. of Questions |
27 |
Type of Questions |
Very Short Answer – 2 marks |
Short Answer I – 2 marks |
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Short Answer II – 3 marks |
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Long Answer I – 5 marks |
CBSE 12th Biology Marking Scheme 2020-21
Download Class 12 Biology marking Scheme for Better preparation and Score Good Marks
Click Here to download Class 12 Marking Scheme 2020-21
Unit |
Title |
Marks |
VI |
Reproduction |
14 |
VII |
Genetics and Evolution |
18 |
VIII |
Biology and Human Welfare |
14 |
IX |
Biotechnology and its Applications |
10 |
X |
Ecology and Environment |
14 |
Total |
70 |
CBSE Class 12 Biology Practical Exam Pattern 2020-21
In 12th Biology, Practical exams play an important role, Here is the Detailed Syllabus and Exam pattern for Practicals. The total time allowed for the Practical exam is 3 hours for 30 marks.
Evaluation Scheme | Marks |
One Major Experiment Part A (Experiment No- 1,3,7,8) | 5 Marks |
One Minor Experiment Part A (Experiment No- 6,9,10,11,12,13) | 4 Marks |
Slide Preparation Part A (Experiment No- 2,4,5) | 5 Marks |
Spotting Part B | 7 Marks |
Practical Record + Viva Voce | 4 Marks |
Practical Record + Viva Voce | 5 Marks |
Total | 30 Marks |
NCERT Biology Class 12 Textbooks PDF 2020-21
The Biology book covers topics like Reproduction in Organisms, Human Reproduction, Sexual Reproduction in Flowering Plants, etc.
The book is specially created to provide a depth concept on the subject and also helps to prepare for various entrance exams.
- Download CBSE Science Class 12 Biology Book in English
- Download CBSE Science Class 12 Biology Book in Hindi
The book is specifically focused on living Organisms, Evolution, and Biotech. While, for Human Ecology, there is a separate book.
Here you can download Chapter-wise NCERT Textbook for Class 12 Biology for Hindi and English Medium.
Download Chapter-Wise NCERT Class 12 Biology Textbooks PDF 2020-21 For English Medium
Here we are providing the chapter-wise NCERT Class 12 Biology Textbooks PDF. You can read it online or download it easily.
Unit VI Reproduction
- Chapter 1 Reproduction in organisms
- Chapter 2 Sexual Reproduction in Flowering Plants
- Chapter 3 Human Reproduction
- Chapter 4 Reproductive Health
Unit VII Genetics and Evolution
- Chapter 5 Principles of Inheritance and Variation
- Chapter 6 Molecular Basis of Inheritance
- Chapter 7 Evolution
Unit VIII Biology in Human Welfare
- Chapter 8 Human Health and Disease
- Chapter 9 Strategies for Enhancement in Food Reproduction
- Chapter 10 Microbes in Human Welfare
Unit IX Biotechnology
Unit X Ecology
- Chapter 13 Organisms and Populations
- Chapter 14 Ecosystems
- Chapter 15 Biodiversity and Conservation
- Chapter 16 Environmental Issues
Download Chapter-Wise NCERT Biology Class 12 2020-21 PDF For Hindi Medium
Here we are providing the chapter-wise NCERT Class 12 Biology Textbooks PDF 2020. You can read it online or download it easily.
इकाई छः जनन
- अध्याय 1 जीवों में जनन
- अध्याय 2 पुष्पी पादपों में लैंगिक प्रजनन
- अध्याय 3 मानव जनन
- अध्याय 4 जनन स्वास्थ्य
इकाई सात: आनुवंशिकी तथा विकास
इकाई आठ: मानव कल्याण में जीव विज्ञान
- अध्याय 8 मानव स्वास्थ्य तथा रोग
- अध्याय 9 खाद्य उत्पादन में वृद्धि की कार्यनीति
- अध्याय 10 मानव कल्याण में सूक्ष्मजीव
इकाई नौ: जैव प्रौद्योगिकी
इकाई दस: पारिस्थितिकी
- अध्याय 13 जीव और समष्टियाँ
- अध्याय 14 पारितंत्रा
- अध्याय 15 जैव-विविध्ता एवं संरक्षण
- अध्याय 16 पर्यावरण के मुद्दे
Highly Important Links Related To CBSE Class 12
How to Download CBSE Class 12 Biology Syllabus 2020-21 from the Official Website?
Follow the steps given below to download the CBSE 12th syllabus for Biology 2020-21 from the official website:
- Step 1 – Go to the official website, cbseacademics.nic.in.
- Step 2 – On the home page, click on the ‘Curriculum’ option.
- Step 3 – Click on the ‘Senior Secondary Curriculum (XI-XII)’.
- Step 4 – Select Academic Electives – (Group-A).
- Step 5 – Now click on the Biology tab. The CBSE Class 12 Biology Syllabus 2020-21 will get displayed on your screens. Save the syllabus in pdf format.
We have covered the detailed guide on Revised CBSE Class 12 Biology Syllabus 2020-21. Feel free to ask any questions related to Class 12 Biology in the comment section below.
FAQs Related To CBSE Class 12 Biology Syllabus 2020-21 (New)
Is NCERT book enough to prepare for the exams?
Yes, NCERT books are enough to prepare for the exams and cover CBSE class 12 Biology syllabus 2020-21.
Is this CBSE 12th syllabus 2020-21 latest?
Yes, this syllabus is the latest syllabus, as released by CBSE after reduction.
What are the passing marks in CBSE Class 12th exams?
Students must score at least 33 per cent marks per subject in order to pass the CBSE Class 12 exams.
very useful.Students can get all the information about the biology exam.
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