This category covers the fundamental principles of genetics and the molecular basis of inheritance. Topics include DNA structure, gene function, Mendelian and non‑Mendelian patterns, and modern molecular techniques. It helps students build a solid foundation for biology and competitive exams.
(A),(D) and(E) only correct as per Directions For Questions Which of the fo biology principle.
Ref: NCERT Biology Class XII — Principles of Inheritance and Variation
(A),(C) and(D) only correct as per Directions For Questions Identify the re biology principle.
Ref: NCERT Biology Class XII — Principles of Inheritance and Variation
5'-UAACUUGAC-3' correct as per The sequence of nitrogen bases of the te biology principle.
Ref: NCERT Biology Class XII — Principles of Inheritance and Variation
In vitro fertilization - Test tube baby correct as per Find the correct pair: biology principle.
Ref: NCERT Biology Class XII — Principles of Inheritance and Variation
9 and 4 respectively correct as per What will be the number of genotypes and biology principle.
Ref: NCERT Biology Class XII — Principles of Inheritance and Variation
Lamarck example giraffe neck elongation use and disuse inheritance acquired characters.
Ref: NCERT Biology Class XII — Principles of Inheritance and Variation
Most accepted human evolution Australopithecus → Homo habilis → erectus → sapiens.
Ref: NCERT Biology Class XII — Principles of Inheritance and Variation
Darwin's finches adaptive radiation, divergent evolution from common ancestor.
Ref: NCERT Biology Class XII — Principles of Inheritance and Variation
Natural selection acquiring value other than mean disruptive selection, extremes favoured.
Ref: NCERT Biology Class XII — Principles of Inheritance and Variation
Angiosperms developed Cretaceous period, dominant flowering plants evolution.
Ref: NCERT Biology Class XII — Principles of Inheritance and Variation
Chance elimination alleles small population genetic drift, Sewall Wright effect.
Ref: NCERT Biology Class XII — Principles of Inheritance and Variation
Miller-Urey experiment chemical evolution origin of life, amino acids synthesis.
Ref: NCERT Biology Class XII — Principles of Inheritance and Variation
