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CBSE Class 12 Biology Syllabus: 2020-21 Download PDF

Download CBSE 12th Biology Syllabus 2020-21 PDF and prepare for CBSE 12th Biology board exam 2020-21. 

May 11, 2020 11:03 IST
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CBSE Syllabus 2020-21
CBSE Syllabus 2020-21

Download CBSE 12th Biology Syllabus 2020-21 PDF and prepare for CBSE 12th Biology board exam 2020-21. This NCERT based CBSE 12th Biology Syllabus (Theory & Practical) is important for preparation. Links to other important articles for preparation of CBSE 12th Biology board exam 2020-21 are also available here.

CBSE Class 12 Biology Syllabus 2020-21: 

Unit

Title

No. of Periods

Marks

VI

Reproduction

30

14

VII

Genetics and Evolution

40

18

VIII

Biology and Human Welfare

30

14

IX

Biotechnology and its Applications

30

10

X

Ecology and Environment

30

14

 

Total

160

70

NCERT Exemplar Solutions for CBSE Class 12 Biology: All Chapters

NCERT Solutions for CBSE Class 12 Biology ‒ All Chapters

CBSE Class 12 Biology Syllabus 2020-21: Download PDF

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.

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 formation.

Chapter-3: Human Reproduction

Male and female reproductive systems; microscopic anatomy of testis and ovary; gametogenesis

- spermatogenesis and 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 (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).

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 - haemophilia, colour 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.

Chapter-7: Evolution

Origin of life; biological evolution and evidences for biological evolution (paleontology, comparative anatomy, embryology and molecular evidences); Darwin's contribution, modern synthetic 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; adaptive radiation; 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, sewage treatment, energy generation and microbes as bio-control agents and bio-fertilizers. Antibiotics; production and judicious use.

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.

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

Ecosystems: Patterns, components; 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

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.

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).

CBSE Class 12 Biology Syllabus 2020-21: Practicals 

List of Experiments (60 Periods)

Prepare a temporary mount to observe pollen germination.

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 them.

Collect water from two different water bodies around you and study them for pH, clarity and presence of any living organism.

Study the presence of suspended particulate matter in air at two widely different sites.

Study the plant population density by quadrat method.

Study the plant population frequency by quadrat method.

Prepare a temporary mount of onion root tip to study mitosis.

Study the effect of different temperatures and three different pH on the activity of salivary amylase on starch.

Isolate DNA from available plant material such as spinach, green pea seeds, papaya, etc.

Study/observation of the following (Spotting)

Flowers adapted to pollination by different agencies (wind, insects, birds).

Pollen germination on stigma through a permanent slide or scanning electron micrograph.

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 slides.

T.S. of blastula through permanent slides (Mammalian).

Mendelian inheritance using seeds of different colour/sizes of any plant.

Prepared pedigree charts of any one of the genetic traits such as rolling of tongue, blood groups, ear lobes, widow's peak and colourblindness.

Controlled pollination - emasculation, tagging and bagging.

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 cause.

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 adaptations.

CBSE Class 12 Biology Syllabus 2020-21: Download PDF

 

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