Edudel Syllabus 2025 Class 12 Biology

ANNUAL SYLLABUS (2024-25) ))) )

CLASS-12, SUBJECT: BIOLOGY (044)

Unit Title Marks
VI Reproduction 16
VII Genetics and Evolution 20
VIII Biology and Human Welfare 12
IX Biotechnology and its Applications 12
X Ecology and Environment 10
Total 70

Orientation and Recapitulation: Discussion on importance of Biology, scope of Biology and
other topics of interest.
Unit-VI Reproduction:
Marks 16
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).
• Prepare a temporary mount to observe pollen germination.
• Flowers adapted to pollination by different agencies (wind, insects, birds).
• Controlled pollination - emasculation, tagging and bagging.
• Identification of stages of gamete development, i.e., T.S. of testis and T.S. of ovary through
permanent slides (from grasshopper/mice).
• T.S. of blastula through permanent slides (Mammalian).
Unit-VII Genetics and Evolution:
Marks 20

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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 (palaeontology,
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.
• Meiosis in onion bud cell or grasshopper testis through permanent slides.
• Prepared pedigree charts of any one of the genetic traits such as rolling of tongue, blood
• groups, ear lobes, widow's peak and colour blindness.
• Mendelian inheritance using seeds of different colour/sizes of any plant (monohybrid and
dihybrid ratio verification)
• Flash cards or models showing examples of homologous and analogous organs
Unit-VIII : Biology and Human Welfare,
Marks: 12
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-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.
• 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.
Unit-IX Biotechnology and its Applications,
Marks: 12
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.

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• Prepare a temporary mount of onion root tip to study mitosis.
• Isolate DNA from available plant material such as spinach, green pea seeds, papaya, etc.
Note:
➢ The above mid-term syllabus is to be completed by September 13, 2024.
Revision of syllabus for Mid –Term Examination 2024
Mid –Term Examination 2024
Unit-X Ecology and Environment,
Marks: 10
Chapter-13: Organisms and Populations
Population interactions - mutualism, competition, predation, parasitism; population attributes -
growth, birth rate and death rate, age distribution. (Topics excluded: Organism and its
Environment, Major Abiotic Factors, Responses to Abiotic Factors, Adaptations)
Chapter-14: Ecosystem
Ecosystems: Patterns, components; productivity and decomposition; energy flow; pyramids of
number, biomass, energy (Topics excluded: Ecological Succession and Nutrient Cycles)
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.
Practical (Practicals should be conducted alongside the concepts taught in theory classes.)
• Study the plant population density by quadrat method.
• Study the plant population frequency by quadrat method.
• Models specimen showing symbiotic association in root modules of leguminous plants,
Cuscuta on host, lichens.
PROJECT: Submission of Project Report
Note:
➢ The entire syllabus is to be completed by December 13, 2024.
➢ Revision of entire syllabus for Pre-board and Annual Examination 2025.
For more information kindly visit to CBSE Academic:
https://cbseacademic.nic.in/web_material/CurriculumMain25/SrSec/Biology_SrSec_2024-25.pdf
PRACTICALS

Time:3 Hours Max.Marks:30
Evaluation Scheme Marks
One Major Experiment 5 5
One Minor Experiment 2& 3 4
Slide Preparation 1 & 4 5
Spotting 7
Practical Record + Viva Voce 4
Investigatory Project and Its Project Record + Viva Voce 5
Total 30

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