Principles of Inheritance and Variation Class 12 Notes
Chapter 5 Principles of Inheritance and Variation
The Principles of Inheritance and Variation feature interesting themes that are important to the jury's consideration. However, Chapter 5 of Grade 12 Biology develops the concepts of heredity and variation, Mendelian deviation, sex determination, genetic inheritance, mutation, dual inheritance, genetic disorders, etc.
CBSE CLASS 12th BIOLOGY CH-5
Points to Remember
Below we have provided some of the important points to remember for this chapter to ace your exams:
Genetics is a branch of biology that deals with the principles of inheritance and its practices.
The Monohybrid cross is the simplest cross performed by Mendel, and it is the cross made to study the inheritance of a single character.
The reciprocal cross occurs when two genotypes or phenotypes are crossed with reversed sources of gametes in one cross.
Recessive is when two, unlike unit factors, are present in one individual; one unit factor is dominant to the other, which is said to be recessive.
Dihybrid cross is a cross between two individuals for studying the inheritance of two characters.
Epistatic is a gene that masks another gene’s expression, and Hypostatic is a gene whose expression is masked by a non-allelic gene.
Linked genes are on the same chromosome, and unlinked genes are on nonhomologous chromosomes.
Topics and Sub-topics
Students can go through the NCERT notes and practice all the in-text questions to score good marks in the Biology Class 12 Exams. Before getting into the NCERT notes for this chapter, below is the list of Important topics included in this chapter:
Before getting into the NCERT notes for this chapter, below is the list of Important topics included in this chapter:
Topics and Sub-topics
The knowledge of genetics has helped us in many ways, be it developing new varieties of crops or developing new breeds of animals. However, Vidyakul provides all the essential reference books and practising content to help students increase their subject knowledge. Principles of Inheritance and Variation consist of six topics. In conclusion, Students can go through the NCERT notes and practice all the in-text questions to score good marks in the Biology Class 12 Exams. Before getting into the NCERT notes for this chapter, below is the list of Important topics included in this chapter:
Frequently Asked Questions
What is the theory behind the ‘Mendeleev's law of Inheritance?
The key principles of Mendelian inheritance are summed up by Mendel’s three laws: the Law of Independent Assortment, the Law of Dominance, and the Law of Segregation.
What is meant by F1 and F2 generation?
F1 is the first filial generation obtained by crossing two different parents. F2 is the second filial generation obtained by self-crossing the F1 generation.
What is ‘Thalassemia’?
Thalassemia is an inherited blood disorder that causes your body to have less hemoglobin than normal
Practice Questions
What is point mutation? Give one example
Define the Principles of Inheritance and Variation?
Differentiate between Homozygous and Heterozygous?
List out the three main laws proposed by Gregor Johann Mendel?
Genetics is a branch of biology that deals with the principles of inheritance and its practices.
The Monohybrid cross is the simplest cross performed by Mendel, and it is the cross made to study the inheritance of a single character.
The reciprocal cross occurs when two genotypes or phenotypes are crossed with reversed sources of gametes in one cross.
Recessive is when two, unlike unit factors, are present in one individual; one unit factor is dominant to the other, which is said to be recessive.
Dihybrid cross is a cross between two individuals for studying the inheritance of two characters.
Epistatic is a gene that masks another gene’s expression, and Hypostatic is a gene whose expression is masked by a non-allelic gene.
Linked genes are on the same chromosome, and unlinked genes are on nonhomologous chromosomes.
What is the theory behind the ‘Mendeleev's law of Inheritance?
What is meant by F1 and F2 generation?
What is ‘Thalassemia’?
What is point mutation? Give one example
Define the Principles of Inheritance and Variation?
Differentiate between Homozygous and Heterozygous?
List out the three main laws proposed by Gregor Johann Mendel?
Learn more about this in Principles of Inheritance and Variation Class 12 Notes pdf.
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