Tamilnadu Board Syllabus for Class 12 Biology , Biology 12th standard syllabus, biology state board syllabus,Biology plus two syllabus, Biology syllabus for class XII, BIOLOGY Syllabus of plus two (12th) examination

Tamilnadu Board Syllabus for Class 12 Biology , Biology 12th standard syllabus, biology state board syllabus,Biology plus two syllabus, Biology syllabus for class XII, BIOLOGY Syllabus of plus two (12th) examination

BIOLOGY Syllabus of plus two (12th) examination

Tamilnadu Board 

Class 12 Biology Syllabus

Unit - I        Sexual Reproduction                         12 Marks

Unit - II      Genetics and Evolution                       20 Marks

Unit - III     Biology and Human Welfare              12 Marks

Unit -IV      Biotechnology and Its Applications    12 Marks

Unit - V      Ecology and Environment                   14 Marks


Unit I : Sexual Reproduction

Pollination and fertilization in flowering plants.

Development of seeds and fruits.

Human reproduction : reproductive system in male and female, menstrual cycle, production of 

gametes, fertilization,implantation, embryo development, pregnancy and parturition.

Reproductive health:birth control, contraception and sexually transmitted diseases.



Unit II : Genetics and Evolution

Mendelian inheritance.

Chromosome theory of inheritance, deviations from Mendelian ratio (gene interactionincomplete dominance, co-dominance, complementary genes, multiple alleles).

Sex determination in human beings : XX, XY.

Linkage and crossing over.

Inheritance pattern of haemophilia and blood groups in human beings.

DNA: replication, transcription, translation.

Gene expression and regulation.

Genome and Human Genome Project.

DNA fingerprinting.

Evolution : Theories and evidences.



Unit III Biology and Human Welfare

Animal husbandry.

Basic concepts of immunology, vaccines.

Pathogens and parasites.

Plant breeding, tissue culture, food production.

Microbes in houshold food processing, industrial production, sewage treatment and energy generation.

Cancer and AIDS.

Adolescence, drugs and alcohol abuse.



Unit IV Biotechnology and Its Applications

Recombinant DNA technology.

Applications in Health, Agriculture and Industry.

Genetically modified (GM) organizms; biosafety issues.

Insulin and Bt cotton.



Unit V Ecology and Environment

Ecosystems components, types and energy flow.

Species, population and community.

Ecological adaptations.

Centers of diversity and conservation of biodiversity, National Parks and Wild Life Sanctuaries.

Environmental issues.