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Important Questions for Class 10 Science Chapter 8 - Heredity

JEE Mains & Advanced

Chapter 8 of CBSE Class 10 Science covers Heredity and Evolution. The concepts of sexual reproduction, heredity, how evolution occurs, etc., are all covered in this chapter 8. In this chapter, you will learn about the process by which variations are produced and passed down in many living species. One will have a deeper understanding of the effects of these variances as well as the evolutionary process.

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Our academic experts understand how important it is to solve problems in order to understand scientific concepts on a regular basis. Questions from many sources, such as the NCERT textbook, NCERT examples, last year’s test questions, other reference books, etc., have been compiled by our team. You can obtain these questions and their answers by consulting our important questions Class 10 Science Chapter 8.

In order to assist candidates in answering these questions, our science faculty members have created step-by-step guidelines. Students can access the Chapter 8 Class 10 Science important questions question bank by registering on our website.

You can find a variety of additional study materials on our website in addition to the Important Questions Class 10 Science Chapter 8, such as NCERT chapter-by-chapter solutions, CBSE revision notes, previous year test questions, etc.

Important Topics & Sub-topics of  Heredity  Class 10 Science

Certainly! Let's delve into more detail on the important topics and sub-topics related to heredity in Class 10 Science:

1. Heredity and Variation

  • Definition of heredity.

  • Factors influencing heredity.

  • Types of variations – inherited and acquired.

2. Mendel's Laws of Inheritance

  • Mendel's experiments with pea plants.

  • Law of Dominance: Understanding dominant and recessive traits.

  • Law of Segregation: Separation of alleles during gamete formation.

  • Law of Independent Assortment: Independent segregation of different gene pairs.

3. Sex Determination

  • Explanation of how sex is determined in organisms.

  • Differentiation between XX and XY chromosomes.

  • Examples of sex-linked traits.

4. Genetic Disorders

  • Definition and causes of genetic disorders.

  • Examples such as hemophilia, color blindness, and cystic fibrosis.

  • Understanding the role of mutations in genetic disorders.

5.  Evolution

  • Natural selection: Survival of the fittest.

  • Adaptation: How organisms adapt to their environment.

  • Evidence of evolution: Fossils, homologous structures, vestigial organs.

6. Human Reproductive System

  • Male reproductive system: Structure and functions.

  • Female reproductive system: Structure and functions.

  • Menstrual cycle and fertilization.

7. DNA and Genetic Material

  • Introduction to DNA as the carrier of genetic information.

  • Structure of DNA: Double helix, nucleotides.

  • Replication of DNA during cell division.

8.  Biotechnology and its Applications: Genetic engineering: Manipulation of genes.

  • Recombinant DNA technology.

  • Applications of biotechnology in agriculture and medicine.

These topics provide a detailed understanding of heredity, genetics, and their broader implications in the context of Class 10 Science. Each sub-topic contributes to building a comprehensive knowledge base in the field of biology at this level.

Class 10 Science  Chapter 8 Heredity  Weightage

The weightage for Chapter 8, "Heredity," in Class 10 Science can be influenced by factors such as the curriculum design, examination pattern, and emphasis given by the educational board.

Typically, in most Class 10 Science curricula, Heredity is considered an important chapter due to its fundamental concepts in biology. It often holds moderate to high weightage in examinations because understanding heredity lays the groundwork for various biological principles.

To get the most accurate and up-to-date information on the weightage of Chapter 8 in your specific educational board or curriculum, it is recommended to refer to the official syllabus, examination pattern, or guidelines provided by the respective education board or institution. 

Tips to Solve Class 10 Science Chapter 8 Heredity

1. Understand Basics: Ensure a solid grasp of fundamental concepts like genes, alleles, and the structure of DNA. This forms the foundation for understanding heredity.

2. Study Pedigree Charts: Practice interpreting pedigree charts to understand the inheritance of traits within families. This visual representation can aid in solving problems related to heredity.

3. Mendelian Laws: Familiarize yourself with Mendel's laws of inheritance – law of segregation and law of independent assortment. Practice applying these laws to solve problems.

4. Punnett Squares: Master the use of Punnett squares to predict the outcomes of genetic crosses. This tool helps visualize the possible combinations of alleles.

5. Sex Determination: Understand the mechanisms of sex determination in humans and other organisms. This includes the role of sex chromosomes and how traits are inherited differently in males and females.

6. Genetic Disorders: Be aware of common genetic disorders and their characteristics. Understand how these disorders are inherited and the implications for individuals and families.

7. Environmental Factors: Recognize that while genetics play a significant role, environmental factors can also influence traits. Consider both genetic and environmental aspects when analyzing heredity.

8. Practice Diagrams: Draw and label diagrams related to heredity. This can include representations of Punnett squares, pedigrees, and the structure of DNA. Visualizing these concepts can enhance your understanding.

9. Real-life Examples: Relate heredity concepts to real-life examples. Understand how traits are passed down in your own family or explore case studies of inherited characteristics.

10. Revision: Regularly review and revise the concepts. This helps in reinforcing your understanding and ensures that you retain the information for exams.

Remember, consistent practice and understanding the underlying principles will contribute to your ability to solve problems related to heredity effectively.

Benefits of Solving Class 10 Science Chapter 8 Important Questions with Answers

Certainly! Here's a more detailed breakdown of the benefits:

1. Conceptual Clarity: Important questions often target fundamental concepts. By solving them, you reinforce your understanding of the key principles covered in Class 10 Science Chapter 8. This clarity is crucial for building a strong foundation in the subject.

2. Application of Knowledge: Important questions are designed to assess your ability to apply theoretical knowledge to practical situations. By solving them, you develop the skill of applying scientific principles to real-world scenarios, enhancing your problem-solving abilities.

3. Critical Thinking: Many important questions involve higher-order thinking skills. They may require you to analyze, evaluate, or synthesize information. Engaging with such questions promotes critical thinking, a skill valuable not only in academics but also in various aspects of life.

4. Exam Preparedness: Chapter 8 important questions are often curated with the exam pattern in mind. By solving them, you become familiar with the types of questions that could appear in exams, helping you prepare more effectively and manage your time during the actual examination.

5. Revision and Recall: Repeatedly engaging with important questions reinforces your memory of crucial information. Regular revision through solving these questions helps consolidate your learning, making it easier to recall facts and concepts during exams.

6. Self-Assessment: By attempting questions and checking your answers, you get immediate feedback on your understanding. This self-assessment allows you to identify areas of strength and weakness, enabling you to focus your efforts on areas that require further attention.

7. Confidence Building: Successfully solving important questions boosts your confidence. As you tackle more challenging problems and see improvement in your performance, you develop a sense of confidence that is beneficial not only in exams but also in approaching new topics or challenges.

8. Holistic Learning: Important questions often cover various aspects of a chapter, ensuring a more comprehensive understanding. This holistic approach to learning is valuable for students, as it helps them see the interconnectedness of different concepts within a chapter.

In summary, solving Class 10 Science Chapter 8 important questions with answers is a multifaceted approach that contributes to a deeper understanding of the subject, improved problem-solving skills, and enhanced exam readiness.

Frequently Asked Questions 

Answer: Some important topics of Chapter 8 of Class 10 Science NCERT book are:

  • Understanding DNA and RNA.

  • The mechanism of inheritance and evolution.


Answer: Heredity is about traits and characters being transferred from parents to their offspring. Hereditary variation has variation in the genomes that alter genes in all organisms. Genetic variation is important for the survival of the species because growth is restricted in the case of definite disparity in genes. Also, evolution in different generations comes with genetic enhancement and variations such as, you may have similar traits and looks as your great-grandparents but your personality is more like that of your parents.


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