In this article you will get the clue that from where and how the questions are being framed from the chapter Principles of Inheritance and Variation

The experts of jagranjosh.com have full confidence that you will not miss any of the questions in the board exam as well as in competitive exams from this chapter if you will keep the following terms / question in your mind while studying.

What is factor?

What are traits?

What is allelomorph?

Alleles

Reason for selecting Pisum sativum

Dominant and recessive traits for all the seven characters

Law of purity of gametes (phenotypic and genotypic ratios)

Law of new combination / law of independent assortment (phenotypic and genotypic ratios)

Back cross and test cross with definition (mono hybrid and dihybrid both)

Genotypic and phenotypic ratios of both back cross and test cross (mono hybrid and dihybrid)

Calculation of gametes in

Mohybrid cross

Dihybrid cross

Trihybrid cross

Modification in Mendels  monohybrid cross ratio and dihybrid cross ratio

Incomplete and co-dominance with cross diagram (phenotypic and genotypic ratios)

Lethal genes (phenotypic and genotypic ratios)

How 9:3:3:1 ratio gets modified in Incomplete and co-dominance

Concept of multiple alleles

Numbers of alleles which are present in the ABO blood group gene

What are pseudo alleles?

Contribution of T.H. Morgan in genetics

Difference between linkage and crossing over with diagram

Coupling

Child and parents blood group related problems

Pedigree analysis and its significance

Sex determination in human beings

What is Barr body?

Point mutation wit example

Chromosomal theory of the inheritance?

Polyploidy and aneuploidy

Number of chromosomes in different types of syndrome