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Heredity

NIOS · Class 10 · Science & Tech

Complete topic list for Heredity in NIOS Class 10 Science & Tech. Key concepts, sub-topics, and what to focus on for board exams.

45 questions20 flashcards5 concepts

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An illustration defining heredity as the passing of traits from parents to offspring and variation as the differences among individuals of the same species, using examples like family resemblance and
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4 Topics · NIOS Class 10 Science & Tech

Topics in Heredity

1

Introduction to Heredity and Variation

  • Heredity is the passing down of characters from parents to offspring
  • Variation refers to differences between individuals of the same species
  • Heredity is controlled by genes - units of inheritance
2

Mendel's Laws of Inheritance

  • Gregor Johann Mendel (1822-1884) - Father of Genetics
  • Conducted experiments on pea plants for 7 years
  • First Law (Law of Segregation): Each trait is controlled by a pair of factors (genes)
3

Chromosomes and Genes

  • Chromosomes are thread-like structures in the nucleus containing genes
  • Human cells have 46 chromosomes (23 pairs) - diploid number (2n = 46)
  • Chromosomes exist in pairs - one from each parent (homologous pairs)
4

DNA Structure and Replication

  • DNA (Deoxyribonucleic Acid) is the genetic material
  • DNA is a polynucleotide made of nucleotides
  • Each nucleotide has: nitrogenous base, deoxyribose sugar, phosphate group

Key Concepts

Central concept: Heredity

Mendel's LawsChromosomes and GenesDNA ReplicationBlood Group InheritanceSex DeterminationGenetic DisordersModern Applications

Frequently Asked Questions

What are the important topics in Heredity for NIOS Class 10 Science & Tech?
Heredity covers several key topics that are frequently asked in NIOS Class 10 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Heredity — NIOS Class 10 Science & Tech?
Start by understanding all key concepts. Practise previous year questions from this chapter. Revise formulas and definitions regularly. Use flashcards for quick revision 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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