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Molecular Basis of Inheritance — Concept Maps

ICSE · Class 12 · Biology

4 concept maps of Molecular Basis of Inheritance for ICSE Class 12 Biology, each also written out as a text outline.

130 questions45 flashcards4 formulas & key relations5 concepts

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A flowchart illustrating the sequential steps involved in DNA fingerprinting (DNA profiling), from DNA isolation to the detection of hybridized DNA fragments, including restriction digestion, gel elec
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An illustration from Super Tutor's Molecular Basis of Inheritance chapter — alongside flashcards, concept maps and practice questions.

4 Concept Maps

DNA as Genetic Material — Key Experiments

DNA as Genetic Material — Key Experiments

The map in words

  • Proving DNA is Genetic Material
    • Griffith 1928
      • S strain smooth + R strain rough
      • Heat-killed S + live R = Virulent
      • Transforming principle exists
    • Avery MacLeod McCarty 1944
      • DNase destroyed transformation
      • RNase and protease did NOT
      • CONCLUSION: DNA is transforming principle
    • Hershey Chase 1952
      • 35S labels protein coat
      • 32P labels DNA
      • 32P found in bacteria after infection
      • CONCLUSION: DNA is genetic material

Meselson-Stahl Experiment

Meselson-Stahl Experiment

The map in words

  • E. coli grown on 15N heavy medium
    • All DNA is 15N heavy
      • Transfer to 14N normal medium
        • After 1st generation
          • D1
            • After 2nd generation
              • 50% 15N-14N hybrid
              • 50% 14N-14N light
              • PROVES: Semiconservative Replication
  • Intermediate

DNA Structure Key Numbers

DNA Structure Key Numbers

The map in words

  • DNA Double Helix - B form
    • 3.4 Angstrom per base pair
    • 10 base pairs per turn
    • 34 Angstrom per complete turn
    • 20 Angstrom diameter
    • Base Pairing Rules
      • A = T two hydrogen bonds
      • G equivalent C three hydrogen bonds
    • Anti-parallel strands
      • One strand 5 to 3
      • Other strand 3 to 5

How genetic information is stored, copied, expressed, regulated, and analyzed in living organisms

How genetic information is stored, copied, expressed, regulated, and analyzed in living organisms

The map in words

  • How genetic information is stored, copied, expressed, regulated, and analyzed in living organisms
    • Gene
    • Nucleic acids
    • DNA structure
    • Chargaff's rules
    • RNA structure
    • Search for genetic material
    • DNA replication
    • Central dogma

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Frequently Asked Questions

What are the important topics in Molecular Basis of Inheritance for ICSE Class 12 Biology?
Key topics in Molecular Basis of Inheritance include Genes and the Nature of Genetic Material, DNA and RNA: Structure and Base Composition, DNA Double Helix and Packaging of DNA, Replication of DNA. Study these first, then practise questions on each for the ICSE Class 12 board exam.
What do the concept maps for Molecular Basis of Inheritance show?
The 4 maps show how the ideas in Molecular Basis of Inheritance connect: DNA as Genetic Material — Key Experiments; Meselson-Stahl Experiment. Each map is also written out as an outline on this page.
How should I revise Molecular Basis of Inheritance for the ICSE Class 12 board exam?
Learn the core ideas first, then work through the 130 practice questions on Molecular Basis of Inheritance. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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