Principles of Inheritance and Variation explains how traits are transmitted from one generation to the next and how variations arise among individuals. This category focuses on the laws of inheritance, genetic patterns, and sources of variation, making it suitable for Class 11–12 students, NEET aspirants, and undergraduate learners.
In this section, you will study:
Mendel’s experiments and laws of inheritance
Monohybrid and dihybrid crosses
Incomplete dominance, codominance, and multiple alleles
Chromosomal theory of inheritance
Linkage, recombination, and gene mapping
Sex determination and sex-linked inheritance
Genetic disorders and pedigree analysis
NCERT-based explanations, diagrams, MCQs, and exam-oriented questions
The content is structured to build strong conceptual foundations, improve problem-solving and cross-based questions, and help students perform confidently in school examinations, NEET, and undergraduate assessments.
Develop a clear understanding of inheritance patterns and genetic variation to master one of the most scoring and concept-rich areas of Biology.
Q. In plants, what is the role of the flower in reproduction?
A.
Photosynthesis
B.
Water absorption
C.
Pollination and fertilization
D.
Nutrient storage
Solution
The flower is the reproductive structure in flowering plants, facilitating pollination and fertilization to produce seeds.
Q. What is the significance of the Law of Segregation in plant genetics?
A.
It explains how traits are inherited independently
B.
It states that alleles segregate during gamete formation
C.
It describes the dominance of certain traits
D.
It outlines the process of photosynthesis
Solution
The Law of Segregation states that during gamete formation, the two alleles for a trait segregate from each other, ensuring that offspring receive one allele from each parent.
Correct Answer:
B
— It states that alleles segregate during gamete formation
