12th Biology 2015 to 2024 Previous Year Questions | Class 12th Biology Most Important Questions 2025

12th Biology 2015 to 2024 Previous Year Questions | Class 12th Biology Most Important Questions 2025

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[AdityaKLife]

Kaun Kaun 2025 me 95%+ lana chahte hai 💯❤️ Like kare👍

[BhavaniPandey-ikry]

Nice class ma'am ji 🎉🎉🎉🎉 aap mere liye kitna mehnat karte hai 🎉🎉🎉 esliye. Thanks 🙏🙏🙏🙏🙏🙏

[JitendraKumar-cwmk]

Mam maaf Karna Sham mein class nahin le paye

[khushiv]

Ling niradhar XY prakar ka hota hai 46gudshutr ya 23jodi gudshutr hote hai jisme female me xx tatha mele me xy hote hai male nirdharit karta hai ki hone wali santan ladki ya ladka hogi

[RidhuR-pw]

Nar me xy gurn sutr tatha mada me xx gurnsutr hote h, yadi mada ka ek x tatha nar ka ek x milta h to putri ka nirman hota h tatha nar ka ek x evam mada ka ek y milte h to ek putra ka nirman hota h, ling nirdharan k liy keval nar responsible hote h kyunki nar m xy alag alag h, mada me xx ek jaise h . name = ridhima roshan

[rajeshram]

मानव में लिंग निर्धारण एक्स वाई(xy) प्रकार से होता है जिसमें 23 जोड़ी गुणसूत्र माय mein 22 +xx तथा तथा नर में 22+xy होता है🎉🎉

[ASHARANI-myli]

@ alpha institute ❣️
Xy नर गुणसूत्र मनुष्यों में लिंग निर्धारण के लिए जिम्मेदार होते हैं

[InfomRabiulah-zdgr]

Manv me 46 gun sutr (23pair) paye jate hai. Male me XY(22+1)ling gun surt and female me XX(23) gunsurt paye jate hai jab male ke X gun sutr Female ke X gun sutr se milta hai to girl And jab male ke Y gun sutr Female ke X gun sutr se milta hai to boy Banta hai
Ling nirdharn ka jimmedar XY gun sutr hote hai.

[RaginiKushwaha-nr]

अल्फा इंस्टीट्यूट H.w मानव लिंग गुणसूत्र निर्धारण मादा में xx तथा नर में xy होता है

[AyushPatel-pfen]

मानव मे लिंग् निर्धारण xy से होता है जिसमे 23 जोड़ी गुणसूत्र मे से 22 जोड़ी गुणसूत्र नर व मादा मे पाये जाते हैं जबकी मादा मे xx गुणसूत्र पाए जाते हैं तथा नर में xy गुणसूत्र पाया जाता हैं अगर xx मिलता है तो लड़की होती हैं xy मिलता है तो लड़का बनता है❤❤❤

[SanojPrajapati-wy]

मानव मे ling nirdharan 23 गधसूत्र hone par yem mada me 22 artosom ek dusre se salman hota hai tab jakar Manw me ling nirdharan hota hai. ❤

[ShankarLalPrajapat]

मैं मानव में लिंग का निर्धारण पिता के ऊपर निर्भर करता है पिता के वाई गुणसूत्र से लड़का होता है x गुणसूत्र गुणसूत्र के मिलने से लड़की होती है 🆔 शंकर प्रजापत

[AnjaliYadav-xkwe]

Sambhog ke dwaran nar aur mada gamate ke sanlayan se santati ka ling nirdharan hota hai.jab mada gamate xx ka sanlayan nar gamate xy se hota hai to xx wali santati mada aur xy wali santati nar hota hai

[AhirAhir-bmhq]

Jai maa sarshwati 🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏

[pradeepkushwaha]

नर के xy गुणसूत्र लिंग निर्धारण के लिए उत्तरदामी होते है❤

[kameswardas]

Manav me 23 jore gunanphal paaye jaate hai 22jora saman hota hai and 23va jora aasaman hota hai❤❤❤❤❤❤❤

[SimpiRani]

Xy नर गुणसुत्र के मनुष्य मे लिगं निर्धारण के लिए जिम्मेदार होता है

[ExcitedBloomingFlower]

XY नर गुणसूत्र मनुष्यों मे लिंग निर्धारण के लिए जिम्मेदार होते हैं

[AnokhaKumari-xuyw]

Human me ling nirdharn XY type ke hote hai or mele ka 23 jodo me xy hota hai or female ke 23 joda XX prakrit ke hote hai jab in dono ke bich sanlay karaya jata hai to santati ka nir man hota jisese boy ka nirman hoti hai mam or likhti but time lagegi sorry

[Study_video_]

मनुष्य में 23 जोड़ी गुणसूत्र होते हैं जिसमें 22 जोड़ी आटोसोम होते है 23 वॉ गुणसूत्र लिंग निर्धारण में सहायक होता है उसे ही सेक्स क्रोमोसोम कहते हैं