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NCERT Solutions Class 10 Science - Chapter 8 Heredity - PDF Download

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NCERT solutions for class 10 science chapter 8 Heredity answers all the questions in the textbook with an in-depth analysis of the topic. eSaral’s highly qualified teachers answer all the intext questions with adequate explanations. We make sure that the relevant content in NCERT solutions Class 10 is updated regularly as per board guidelines. We also make sure that the answers we provide are customized to meet different criteria that teachers use to award marks.

eSaral has now made it possible for students to download their science chapters for free. So, if you're studying Heredity in class 10, you'll be able to find the NCERT Solution right here. It'll help you to access chapters whenever you need to practice. Before your board exams, make sure you read, practice and revise the solutions.

NCERT Solutions for Class 10 Science Chapter 8 Topics


Section Name

Topic Name




Accumulation of Variation During Reproduction



8.1 Accumulation of Variation During Reproduction: The accumulation of genetic variation during reproduction is the process whereby genetic diversity within a population increases over time as a result of sexual reproduction and mutation.

8.2 Heredity: Heredity is the transfer of genetic traits, characteristics and information from parent to child through the transfer of genes. A gene is a segment of DNA that contains instructions for constructing and maintaining the structure and function of an organism. Inheritance is the transfer of traits and characteristics from parent to child over generations.

Subtopics covered in the section 8.2 Heredity:

8.2.1 Inherited Traits

8.2.2 Rules for the Inheritance of Traits - Mendel’s Contributions

8.2.3 How do these Traits get Expressed?

8.2.4 Sex Determination

Key Points of Class 10 Science Chapter 8

  • Heredity refers to the transfer of genetic traits and information from one parent to another through the transfer of genes.

  • Alleles are the segments of the DNA that carry the instructions for a trait. Dominant and recessive traits are characterized by dominant alleles and recessive traits, respectively.

  • A recessive trait is a condition in which a heterozygous individual carries a recessive allele. 

  • Genotype and phenotype refer to an individual’s genetic makeup. 

  • Mendelian genetics describes how alleles are separated during the gamete formation process and how various genes assimilate independently. Punnett squares are a tool used to predict the genetic outcome of cross-breeding between individuals with a known genotype. 

  • Polygenic inheritance refers to the fact that many traits are influenced by several genes, resulting in a variety of phenotypes as well as continuous variation.

  • Environmental influence refers to the influence of genes on phenotypes. 

  • Heredity and Evolution refers to the contribution of genetic variation to the formation of a population through natural selection, with beneficial traits increasing in frequency over generations.

  • Inherited genetic mutations can lead to genetic disorders that can affect an individual’s health and wellbeing. Inheritance of sex-linked traits refers to certain traits that are linked to sex chromosomes and follow certain patterns of inheritance. Chromosomes and genes are found on chromosomes. In humans, there are 23 pairs of chromosomes and one pair determines sex. Sexual reproduction, including gamete fusion and fertilization, introduces genetic diversity.

  • Variation and adaptation: genetic variation allows populations to adjust to changing environments and increase their survival chances.

  • Selective breeding: Humans use selective breeding to emphasize certain traits in plants or animals for agricultural or domestic purposes.

  • DNA is the genetic material that carries genetic information and is the foundation of heredity.

Importance of Downloading the PDF of NCERT Solutions Class 10 Science Chapter 8 Heredity 

eSaral’s class 10 NCERT solutions for science chapter 8 “Heredity” free pdf can help students studying this topic in several ways, which are given below: 

  • Accurate and comprehensive solutions: NCERT Solutions provided by eSaral provide detailed and precise answers to all the questions and exercises of the chapter. This guarantees that students have reliable information to effectively understand the concepts.

  • Clarity in concepts: eSaral NCERT solutions are designed to give clear explanations, diagrams and examples to help students understand complex concepts related to genetics.

  • Exam preparation: Class 10 is one of the most crucial years in a student’s life, and having comprehensive solutions can help students prepare for the exams better. The solutions cover different types of questions that may appear in the exams and help students practice and get familiar with the question patterns.

  • Time-effectiveness: Having well-organized and structured solutions saves time when students work through exercises and study for exams. This makes the learning process more easy and  efficient.

  • Reference for revision: Solutions can be used as a reference for revisions and further study. Students can review the material when studying for tests, examinations, or when moving up to higher level studies.

Frequently Asked Questions

Question 1: What is Heredity?

Answer 1: Heredity refers to the transfer of genetic traits and information from parent to child through the transfer of genes.

Question 2: How does heredity influence traits?

Answer 2: Heredity refers to the inherited characteristics of an individual, such as physical characteristics, behavioral patterns, and disease susceptibility.