NCERT Solutions for Class 12 Biology Chapter 5 – Principles of Inheritance and Variation
NCERT textbooks are recommended by the CBSE and thus form an integral part in preparing for the CBSE exams. Biology is an important part of the subject of Science. Our NCERT Solutions for Class 12 Biology Chapter 5 are prepared by the qualified and experienced faculties who have made them easy to understand and learn. With these NCERT Solutions, we offer you a simplified approach towards the subject.
These solutions will also help you to excel in the concepts and acquire comprehensive knowledge about the various types of questions asked in CBSE Class 9 Examinations. NCERT Solutions for Class 12 Biology Chapter 5 are prepared strictly as per the CBSE curriculum. Our NCERT Solutions are exercise wise and will thus help you to write a proper solution in the exam. NCERT Solutions for Class 12 Biology Chapter 5 also provide you a topic-wise preparation strategy to help you to score good marks.
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CBSE Class 12 Biology – Principles of Inheritance and Variation
In this chapter, you will study Genetics which deals with the inheritance, heredity, and variation of characters from parents to offspring. One of the causes of variation is also sexual reproduction.
The topics covered in the chapter are listed below:
- 5.1 Mendel’s Laws of Inheritance
- 5.2 Inheritance of One Gene
- 5.3 Inheritance of Two Genes
- 5.4 Sex Determination
- 5.5 Mutation
- 5.6 Genetic Disorders
NCERT Solutions for Class 12 Biology Chapter 5
In NCERT Solutions for Class 12 Biology Chapter 5, you will learn Mendel’s Laws of Inheritance, Law of Dominance, Law of Segregation, Law of Independent Assortment, Chromosomal Theory of Inheritance, Mutation, Down’s syndrome, Turner’s syndrome, and Klinefelter’s syndrome.
5.1 Mendel’s Laws of Inheritance:
In this topic, you will study the Mendel’s Law of Inheritance which set up the basic framework of the rules governing inheritance by experimenting with the plants.
5.2 Inheritance of One Gene:
In this topic, you will learn the self-pollination by Mendel and his findings which states that the genes are stably passed down, unchanged, from parent to offspring through the gametes, over successive generations. You will also learn the Law of Dominance, including Incomplete dominance and Co-dominance, and Law of Segregation
5.3 Inheritance of Two Genes:
In this topic, you will study the Law of Independent Assortment, Chromosomal Theory of Inheritance, and Linkage and Recombination.
5.4 Sex Determination:
In this topic, you will study how the sex of a child is determined in humans. The female has only X chromosomes while the males have X and Y both the chromosomes. When the XX chromosomes unite the girl child is born and when XY chromosomes unite a male child is born.
In this topic, you will study Mutation which results in the alteration of DNA sequences. It also consequently results in changes in the genotype and the phenotype of an organism and leads to variation in DNA.
5.6 Genetic Disorders:
In this topic, you will study Pedigree Analysis, Mendelian Disorders, and Chromosomal disorders such as Down’s syndrome, Turner’s syndrome and Klinefelter’s syndrome.
Let us now discuss the subtopics covered in this chapter.
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