CBSE Syllabus For Class 12 Biology Pdf 2021-22

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Here in this post, we share CBSE Syllabus For Class 12 Biology Pdf Download now 2021-2022.

Term Wise CBSE Syllabus For Class 12 Biology Pdf 2021-22

Mentioned below CBSE Class 12 Biology Syllabus for 2021-22 along with the marking scheme and no. of periods. Students can get the number of chapters and subtopics under each unit in the PDF provided above.

Evaluation Scheme (Theory)
UnitsTerm 1Marks
VIReproduction: Chapter – 2, 3 and 415
VIIGenetics and Evolution: Chapter – 5 and 620
UnitsTerm 2Marks
VIIIBiology and Human Welfare: Chapter – 8 and 1014
IXBiotechnology and its Applications: Chapter – 11 and 1211
XEcology and Environment: Chapter – 13 and 1510
Total Theory (Term – I and Term – II)70
Practicals Term – I15
Practicals Term – II15

Students can check out the syllabus of class 1 to class 12 for all the subjects by visiting CBSE Syllabus page.

CBSE Class 12 Biology Practicals Evaluation Scheme

In Biology subject practicals play an important role. Students must focus on practicals simultaneously with the theory learning as it will help them in understanding the subject in a better way. Total 30 marks are devoted to the practicals. performing well in Biology Practicals will increase their overall score in Biology subject. Students can find the list of experiments of class 12 Biology in the syllabus pdf. The table below shows the Evaluation Scheme for CBSE Class 12 Practical exam.

Evaluation Scheme
 Term 1Term 3Marks
Part A
One Major ExperimentExperiment No. – 1Experiment No. – 35
One Minor ExperimentExperiment No. – 2Experiment No. – 4, 53
Part B
Spotting (3 Spots of 1 mark each)B. 1, 2, 3, 4, 5B. 6, 7, 83
Practical Record + Investigatory Project & Record + Viva Voce5

Download: CBSE Syllabus For Class 12 Biology Pdf 2021-22

Biology Class 12 Syllabus [Old Syllabus]

The syllabus consists of five units: (vi) Reproduction (vii) Genetics and Evolution (viii) Biology and Human Welfare (ix) Biotechnology and its Applications (x) Ecology and Environment. Theory paper is of 3 hours and 70 marks.

Exam Structure

VIIGenetics and Evolution18
VIIIBiology and Human Welfare14
IXBiotechnology and its Applications10
XEcology and Environment14

Unit VI: Reproduction

Chapter 1: Reproduction in Organisms

Reproduction, a characteristic feature of all organisms for continuation of species; modes of reproduction – asexual and sexual reproduction; asexual reproduction – binary fission, sporulation, budding, gemmule formation, fragmentation; vegetative propagation in plants; events in sexual reproduction.

Chapter 2: Sexual Reproduction in Flowering Plants

Flower structure; Development of male and female gametophytes; Pollination-types, agencies and examples; outbreedings 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 and fruit formation.

Chapter 3: Human Reproduction

Male and female reproductive systems; Microscopic anatomy of testis and ovary; Gametogenesis-spermatogenesis & oogenesis; Menstrual cycle; Fertilisation embryo development upto 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 (STD); Birth control – Need and Methods, Contraception and Medical Termination of Pregnancy (MTP); Amniocentesis; Infertility and assisted reproductive technologies – IVF, ZIFT, GIFT, AI (brief overview).

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; linkage and crossing over; Sex determination – in human being, birds, grasshopper and honey bee; Mutation, Pedigree analysis, sex linked inheritance – haemophilia, colour blindness; Mendelian disorders in humans – sickle cell anaemia, Phenylketonuria, thalassemia; chromosomal disorders in humans; Down’s syndrome, Turner’s and Klinefelter’s syndromes.

Chapter 6: Molecular Basis of Inheritance

Structure of DNA and RNA; DNA packaging; Search for genetic material and DNA as genetic material; DNA replication; Central Dogma; transcription, genetic code, translation; gene expression and regulation – lac operon; Human genome project; DNA fingerprinting.

Chapter 7: Evolution

Origin of life; biological evolution and evidences for biological evolution (paleontology, comparative anatomy, embryology and molecular evidences); adaptive radiation; Biological evolution: Lamarck’s theory of use and disuse of organs, Darwin’s theory of evolution; mechanism of evolution – variation (mutation and recombination) and natural selection with examples, types of natural selection; Gene flow and genetic drift; Hardy – Weinberg’s principle; brief account of evolution; human evolution.

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, ring worm) and their control; Basic concepts of immunology – vaccines; cancer, HIV and AIDS; Adolescence – drug and alcohol abuse.

Chapter 9: Strategies for Enhancement in Food Production

Animal husbandry, Plant breeding, tissue culture, single cell protein.

Chapter 10: Microbes in Human Welfare

Microbes in food processing, industrial production, Antibiotics; production and judicious use, sewage treatment, energy generation and microbes as bio-control agents and mbio-fertilizers.

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: genetically modified organisms – Bt crops; RNA interference, Human insulin, gene therapy; molecular diagnosis; transgenic animals; biosafety issues, biopiracy and patents.

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 14: Ecosystem

Ecosystem: structure and function; productivity and decomposition; energy flow; pyramids of number, biomass, energy; nutrient cycles (carbon and phosphorous); ecological succession; ecological services – carbon fixation, pollination, seed dispersal, oxygen release (in brief).

Chapter 15: Biodiversity and its Conservation

Concept of biodiversity; patterns of biodiversity; importance of biodiversity; loss of biodiversity; biodiversity conservation; hotspots, endangered organisms, extinction, Red Data Book, biosphere reserves, national parks, sanctuaries and Ramsar sites.

Chapter 16: Environmental Issues

Air pollution and its control; water pollution and its control; agrochemicals and their effects; solid waste management; radioactive waste management; greenhouse effect and climate change impact and mitigation; ozone layer depletion; deforestation; case study exemplifying success story addressing environmental issue(s).

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