Principles of Inheritance and Variation Class 12 Biology - Most Important Questions (PART - 1)

Shivani Ma'am discusses some of the most important questions from the Principles of Inheritance and Variation chapter in Class 12 Biology. Students will find clear explanations of key NCERT concepts, Mendelian genetics, and variation, making it easier to strengthen their understanding for NEET 2026. The session is helpful for quick revision and practice with exam-focused questions.
▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
🌐 𝐉𝐨𝐢𝐧 𝐒𝐡𝐢𝐯𝐚𝐧𝐢 𝐌𝐚'𝐚𝐦 𝐓𝐆 𝐂𝐡𝐚𝐧𝐧𝐞𝐥 𝐅𝐨𝐫 𝐍𝐨𝐭𝐞𝐬, 𝐐𝐮𝐢𝐳𝐳𝐞𝐬, 𝐒𝐭𝐮𝐝𝐲 𝐌𝐚𝐭𝐞𝐫𝐢𝐚𝐥 & 𝐌𝐨𝐫𝐞: https://t.me/Bio_with_shivani_mam
▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
📌 5 𝐌𝐨𝐧𝐭𝐡𝐬 𝐎𝐧𝐥𝐢𝐧𝐞 𝐋𝐢𝐯𝐞 𝐂𝐫𝐚𝐬𝐡 𝐂𝐨𝐮𝐫𝐬𝐞 𝐟𝐨𝐫 𝐍𝐄𝐄𝐓 𝐔𝐆 𝟐𝟎𝟐𝟔:
🔺 NEET SAARTHI Ultimate: https://applink.adda247.com/d/ncaulti...
🔺 NEET SAARTHI: https://applink.adda247.com/d/ncashivani

Use Code: 𝐒𝐇𝐈𝐕𝐈 for Maximum Discount
📞 Call Now for Enrollment Queries: 𝟎𝟕𝟐𝟏𝟕𝟐𝟏𝟕𝟐𝟒𝟕
▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
🔺𝐌𝐈𝐒𝐒𝐈𝐎𝐍 𝐁𝐎𝐀𝐑𝐃𝐒 𝟗𝟓+ | 𝐅𝐨𝐫 𝐅𝐫𝐞𝐞 𝐄𝐧𝐫𝐨𝐥𝐥𝐦𝐞𝐧𝐭 𝐔𝐬𝐞 𝐂𝐨𝐝𝐞 𝐍𝐂𝐄𝐑𝐓𝟏𝟎𝟎: https://applink.adda247.com/d/pWUneKYDOE

📌 𝐁𝐞𝐬𝐭 𝐍𝐂𝐄𝐑𝐓 𝐁𝐚𝐬𝐞𝐝 𝐓𝐞𝐬𝐭 𝐒𝐞𝐫𝐢𝐞𝐬 𝐟𝐨𝐫 𝐍𝐄𝐄𝐓 𝟐𝟎𝟐𝟔:-
🔺 NBTS 4.0 (Offline + Online): https://applink.adda247.com/d/NCERTYT
🔺 NBTS 4.0 (Online): https://applink.adda247.com/d/ncertyt

🔺𝐍𝐄𝐄𝐓 𝐌𝐚𝐡𝐚-𝐏𝐫𝐚𝐜𝐭𝐢𝐜𝐞 𝐂𝐨𝐦𝐛𝐨: https://applink.adda247.com/d/ubl6yUdvSP
▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
📌 𝐉𝐨𝐢𝐧 𝐍𝐂𝐄𝐑𝐓 𝐍𝐄𝐄𝐓 𝐀𝐝𝐝𝐚𝟐𝟒𝟕 𝐒𝐨𝐜𝐢𝐚𝐥 𝐌𝐞𝐝𝐢𝐚 𝐅𝐨𝐫 𝐍𝐨𝐭𝐞𝐬, 𝐐𝐮𝐢𝐳𝐳𝐞𝐬, 𝐒𝐭𝐮𝐝𝐲 𝐌𝐚𝐭𝐞𝐫𝐢𝐚𝐥 & 𝐌𝐨𝐫𝐞:-

🌐 Telegram: https://t.me/Ncertneetadda247
🌐 Instagram:   / ncert.adda247  
📲 To access the video and other study materials on Adda247 app, click - https://applink.adda247.com/d/4dzbqMmJaV
▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
📌 𝐃𝐫𝐞𝐚𝐦 𝐌𝐞𝐝𝐢𝐜𝐚𝐥 𝐂𝐨𝐥𝐥𝐞𝐠𝐞 𝐤𝐞 𝐥𝐢𝐲𝐞 𝐏𝐞𝐫𝐟𝐞𝐜𝐭 𝐒𝐡𝐮𝐫𝐮𝐚𝐚𝐭!
🔹 𝐀𝐜𝐡𝐢𝐞𝐯𝐞𝐫 𝐁𝐚𝐭𝐜𝐡 - NEET UG 2026 Online Course - https://applink.adda247.com/d/achieve...

𝐅𝐨𝐫 𝐂𝐥𝐚𝐬𝐬 𝟏𝟐𝐭𝐡 𝐒𝐭𝐮𝐝𝐞𝐧𝐭𝐬:-
🔺One Mahapack - https://applink.adda247.com/d/12thMah...
🔺One Pro Mahapack - https://applink.adda247.com/d/12thPro...

𝐅𝐨𝐫 𝐂𝐥𝐚𝐬𝐬 𝟏𝟏𝐭𝐡 𝐒𝐭𝐮𝐝𝐞𝐧𝐭𝐬:-
🔺One Mahapack - https://applink.adda247.com/d/11thMah...
🔺One Pro Mahapack - https://applink.adda247.com/d/11thPro...
▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
📌 𝐀𝐁𝐎𝐔𝐓 𝐍𝐂𝐄𝐑𝐓 𝐍𝐄𝐄𝐓 𝐀𝐃𝐃𝐀𝟐𝟒𝟕:-

Welcome to Adda247, India's Largest Vernacular Learning Platform. NCERT NEET Adda247 is your go-to place for NCERT Class 11th & 12th preparation, along with complete guidance for cracking the NEET UG exam. We provide free and paid courses, video lectures, and study materials to help you crack school exams and the NEET.

🔔 Subscribe Now for Daily NEET Prep –    / @ncertneetadda247  
▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬
⏰ 𝐓𝐢𝐦𝐞𝐬𝐭𝐚𝐦𝐩𝐬:-
00:00 - Intro
00:55 - Practice Questions Overview
02:41 - Polling & Participation
04:28 - Genetic Mapping Basics
06:04 - Recombination Concepts
09:41 - Mendelian Ratios & Crosses
27:18 - Pedigree Analysis
38:18 - Major Genetic Disorders
54:59 - Inheritance Mechanisms
01:00:20 - Trisomy & Genotype Questions
01:03:51 - Polygenic Inheritance
01:04:45 - Pleiotropy & PKU
01:10:34 - Sources of Genetic Variation
01:11:57 - Class Closing