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Biology · Class 12Principles of Inheritance and VariationVideo coming soonRead the notes instead
Free notes for this chapterMark as Completed
Mendel's Laws, Deviations from Mendelism, Chromosomal Theory and the board questions built on them — roughly 8 marks of the paper.
What this chapter covers
- 1Mendel's Laws
- 2Deviations from Mendelism
- 3Chromosomal Theory
- 4Sex Determination
- 5Genetic Disorders and Pedigree Analysis
These lessons are being recorded. The written notes for this chapter are free to download now.
Learning resources
Seedha Notes
Chapter notes withimportant points,examples & format
View Notes for Principles of Inheritance and Variation, BiologyPractice Questions
Important questions,board questions,numericals
Practice Now for Principles of Inheritance and Variation, BiologyPrevious yearquestions withfull solutions
View PYQs for Principles of Inheritance and Variation, BiologySample Paper
Board patternsample paper withmarking scheme
Open Paper for Principles of Inheritance and Variation, Biology
In the notes
Topics covered
- 01Mendel's Laws16:25
- 02Deviations from Mendelism29:34
- 03Chromosomal Theory18:23
- 04Sex Determination10:20
- 05Genetic Disorders and Pedigree Analysis9:03
After this chapter you can
- Explain mendel's laws without reading from the book
- Present deviations from mendelism in the format the marking scheme rewards
- Attempt every previous year question set on this chapter
- Marks
- 8
- PYQs
- 11
- Video
- 1h 24m
Then do the work
- One-shot revision, 21 minutes
- Formula sheet for this chapter
- Printable summary, 2 pages
Prepare
| Year | Asked as | Marks |
|---|---|---|
| 2025 | Case based | 12 |
| 2024 | Short answer | 8 |
| 2023 | Long answer | 12 |
| 2022 | MCQ set | 4 |
| 2021 | Case based | 8 |
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