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Heredity

NIOS · Class 10 · Science & Tech

Step-by-step guide to study Heredity in NIOS Class 10 Science & Tech. Topics to cover, practice strategy, and time allocation.

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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Study Plan

1
Day 1–2

Learn the Theory

Read the textbook chapter carefully. Note down definitions, formulas, and key concepts.

2
Day 3

Practice Problems

Solve textbook exercises and additional practice questions. There are 45 questions available for this chapter.

3
Day 4

Revise & Test

Revise key formulas and concepts without looking at notes. Take a practice quiz to test your understanding. Mark weak areas for re-revision.

4
Day 7

Spaced Revision

Revisit Heredity after a week. Use flashcards for quick recall. Solve previous year questions from this chapter.

What to Focus On

  • Heredity is the passing of traits from parents to offspring
  • Variation refers to differences among individuals of the same species
  • Genetics is the science that studies heredity and variation

  • Mendel established the first laws of inheritance through pea plant experiments
  • Each trait is controlled by a pair of factors (genes)
  • Factors separate during gamete formation (Law of Segregation)

  • Chromosomes are made of DNA and proteins
  • Humans have 46 chromosomes (23 pairs)
  • 22 pairs are autosomes, 1 pair is sex chromosomes

Common Mistakes to Avoid

Children always look like a 50-50 mix of both parents, inheriting equal visible traits from each parent

Genes and chromosomes are the same thing

Both parents are equally responsible for determining the sex of their child

Memory Tips

Mendel's Laws of Inheritance

DNA Structure Components

Four Blood Groups (A, B, AB, O)

Sex Determination (XX female, XY male)

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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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