Explain the Law of Dominance using a mon | Class 12 Biology Chapter Principles of Inheritance and Variation, Principles of Inheritance and Variation NCERT Solutions

Current NCERT chapter

Academic session 2026-27, Chapter 4 in the current curriculum.

Welcome to the NCERT Solutions for Class 12 Biology - Chapter Principles of Inheritance and Variation. This page offers a step-by-step solution to the specific question from Exercise 1, Question 4: Explain the Law of Dominance using a monohybrid cross.. With detailed answers and explanations for each chapter, students can strengthen their understanding and prepare confidently for exams. Ideal for CBSE and other board students, this resource will simplify your study experience.

Question 4: Explain the Law of Dominance using a monohybrid cross.
Answer:

Mendel’s law of dominance states that a dominant allele expresses itself in a monohybrid cross and suppresses the expression of recessive allele. However, this recessive allele for a character is not lost and remains hidden or masked in the progenies of F1generation and reappears in the next generation.

For example, when pea plants with round seeds (RR) are crossed with plants with wrinkled seeds (rr), all seeds in F1 generation were found to be round (Rr). When these round seeds were self fertilized, both the round and wrinkled seeds appeared in F2 generation in 3: 1 ratio. Hence, in F1 generation, the dominant character (round seeds) appeared and the recessive character (wrinkled seeds) got suppressed, which reappeared in F2 generation.

A monohybrid cross between round and wrinkled pea seeds

Study Tips for Answering NCERT Questions:

NCERT questions are designed to test your understanding of the concepts and theories discussed in the chapter. Here are some tips to help you answer NCERT questions effectively:

  • Read the question carefully and focus on the core concept being asked.
  • Reference examples and data from the chapter when answering questions about Principles of Inheritance and Variation.
  • Review previous year question papers to get an idea of how such questions may be framed in exams.
  • Practice answering questions within the time limit to improve your speed and accuracy.
  • Discuss your answers with your teachers or peers to get feedback and improve your understanding.

Latest Blog Posts

Stay updated with our latest educational content and study tips

How to Build a Career in Data Analytics Without a Computer Science Degree

All businesses are gathering information on customers, products, employees, and expenditures, and someone must make decisions based on the data. That individual is the data analyst. Unlike many career changers imagine, the job is open to a broader cross-section of the population than a typical career change. A lot of working analysts trained in commerce, … Read more

Read More

Life Insurance vs Health Insurance: Why Families May Need Both

Are often purchased, talked and planned as being a replacement for another. They aren’t. One safeguards your family’s income in your absence and the other safeguards your family’s savings in the event that someone becomes ill. An examination of what they do, what they do not do, and why they are missing it when one … Read more

Read More

Home Loan vs Savings: Compare the Costs Before Buying a Home

Pay upfront, or pay off less and over time? The truth depends on four factors most consumers will never compare at the same time: the interest rate on the house loan, the interest rate on the savings account, the rate of home price appreciation, and the cost of renting the home until you actually buy … Read more

Read More

Business After 30 or a Stable Job: Which Path Should You Choose?

Thirty is when the question starts to get raised and you’re able to do something because you know you have the experience—you know you have the responsibility. Here are some ways to consider the choice based on a realistic assessment without idealizing either aspect. Restlessness is one of those things that appears in your early … Read more

Read More
View All Blog Posts

Related Resources

Exam Information

Get detailed information about CBSE exams, patterns, and preparation tips

View Exam

Full Form

Learn about Full form significance

Explore

Calculator

Use our online calculator for quick calculations and problem solving

Use Calculator

Glossary

Browse our comprehensive glossary of important terms and definitions

View Glossary

Related Student Tools

Class-wise Resources

Explore more educational resources to enhance your learning experience

Class 12 Resources

Complete study resources for this class

Class 11 Resources

Complete study resources for this class

Class 10 Resources

Complete study resources for this class

Class 9 Resources

Complete study resources for this class

Class 8 Resources

Complete study resources for this class

Class 7 Resources

Complete study resources for this class

Class 6 Resources

Complete study resources for this class

Quick Access

NCERT Solutions Sample Papers Formulas Math Tables Calculators Study Blog

Comments

  • Pawan Verma
  • Jul 30, 2020

Most important biology class 12th supplementary paper

  • Alyna
  • Feb 27, 2020

I understood... Thanks

  • Margaret
  • Dec 03, 2019

Thanks, I understand it now

  • Dimpy Bieber
  • Sep 07, 2019

Wow this answer Is in very simple language.thank you very much saral study 😃😃

  • Trisha
  • Aug 03, 2019

Thanks

  • Hritujaya
  • Jul 02, 2019

Thank

  • Geetha
  • Mar 05, 2019

I didn't understand

  • Shoaib
  • Feb 03, 2019

Satisfied thnx

  • Akash
  • Feb 02, 2019

I did not understand

  • ananya
  • Nov 03, 2017

its is an answer to dihybrid cross

Add Comment

Welcome to the NCERT Solutions for Class 12 Biology - Chapter . This page offers a step-by-step solution to the specific question from Excercise 1 , Question 4: Explain the Law of Dominance using a monohybrid cross.....

Students Also Read

Ask a Question
Keep learning

Discover More on SaralStudy

Explore all articles