NCERT Solutions for Class 12 Biology Chapter 5 - Principles of Inheritance and Variation

 

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NCERT Solutions for Class 12 Biology Chapter 5 - Principles of Inheritance and Variation: Have you ever wondered why an elephant always gives birth only to a baby elephant and not any other animal? Or why a mango seed forms only a mango plant and not any other plant? Given that they do, are the offspring identical to their parents? Or do they show differences in some of their characteristics? Have you ever wondered why siblings sometimes look so similar to each other? Or sometimes even so different? These and several related questions are dealt with, scientifically, in a branch of biology known as Genetics. This subject deals with the inheritance, as well as the variation of characters from parents to offspring. NCERT Class 12 Biology Chapter 5 - Principles of Inheritance and Variation will tell you about two important things that are Inheritance and variation. Inheritance is the process by which characters are passed on from parent to progeny, as it is the basis of heredity. Variation is the degree by which progeny differ from their parents. NCERT Solutions for Class 12 Biology Chapter 5 will tell you all related to Inheritance and variation.

NCERT Class 12 Biology Chapter 5 - Principles of Inheritance and Variation will also tell you the work of Mendel and others who followed him gave us an idea of inheritance patterns. However, the nature of those ‘factors’ which determine the phenotype was not very clear. As these ‘factors’ represent the genetic basis of inheritance, understanding the structure of genetic material and the structural basis of genotype and phenotype conversion became the focus of attention in biology for the next century.

Here are the important topics of NCERT Class 12 Biology Chapter 5 - Principles of Inheritance and Variation:

5.1 Mendel’s Laws of Inheritance

5.2 Inheritance of One Gene

    5.2.1 Law of Dominance

    5.2.2 Law of Segregation

        5.2.2.1 Incomplete Dominance

        5.2.2.2 Co-dominance

5.3 Inheritance of Two Genes

    5.3.1 Law of Independent Assortment

    5.3.2 Chromosomal Theory of Inheritance

    5.3.3 Linkage and Recombination

5.4 Sex Determination

5.5 Mutation

5.6 Genetic Disorders

    5.6.1 Sex Determination in Humans

    5.6.2 Sex Determination in Honey Bee

5.7 MUTATION

5.8 GENETIC DISORDERS

    5.8.1 Pedigree Analysis

    5.8.2 Mendelian Disorders

    5.8.3 Chromosomal Disorders

As Mendel proposed the principles of inheritance, which are today referred to as ‘Mendel’s Laws of Inheritance’. There are different types of law which you will study in Chapter 5 - Principles of Inheritance and Variation of NCERT Class 12 Biology. For example Law of Dominance, Law of Segregation, Law of Independent Assortment, etc. 

After going through this chapter thoroughly, you will be able to solve these questions:

Q1. A diploid organism is heterozygous for 4 loci, how many types of gametes can be produced?
Q2. Explain the Law of Dominance using a monohybrid cross.
Q3. Define and design a test-cross.

If you have any problem in solving them, then Solutions for NCERT Class 12 Biology Chapter 5 - Principles of Inheritance and Variation is there for you.

Try to attempt all the questions given in NCERT Class 12 Biology Chapter 5 - Principles of Inheritance and Variation by yourself. If you have any dilemma or not getting the correct answers, then don't worry, NCERT Solutions for Class 12 Biology Chapter 5 - Principles of Inheritance and Variation will help you out in a better way.

Solutions for NCERT Class 12 Biology Chapter 5 - Principles of Inheritance and Variation is also helpful for the preparation of other competitive exams like NEET, AIIMS.

NCERT Solutions for Class 12 Biology Chapter 5 - Principles of Inheritance and Variation: Solved Exercise Questions

NCERT Solutions class 12 – Biology

Chapter 1

Reproduction in organisms

Chapter 2

Sexual Reproduction in Flowering Plants

Chapter 3

Human Reproduction

Chapter 4

Reproductive Health

Chapter 6

Molecular basis of inheritance

Chapter 7

Evolution

Chapter 8

Human health and disease

Chapter 9

Strategies for enhancement in food production

Chapter 10 

Microbes in Human Welfare

Chapter 11

Biotechnology: Principles and Processes

Chapter 12

Biotechnology and its applications

Chapter 13

Organisms and Populations

Chapter 14

Ecosystem

Chapter 15

Biodiversity and Conservation

Chapter 16

Environmental Issues

NCERT Solutions for Class 12- Subject wise

NCERT solutions for Class 12 Maths

NCERT solutions for Class 12 Chemistry

NCERT solutions for  Class 12 Biology

NCERT solutions for Class 12 Physics

 

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