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Meiosis | Dr Najeeb

#medicines #drnajeeb #pharmacology #medicaleducation #drnajeeblectures #meiosis Meiosis | Dr Najeeb Like this video? Sign up now on our website at https://www.DrNajeebLectures.com to access 800+ Exclusive videos on Basic Medical Sciences & Clinical Medicine. These are premium videos (NOT FROM YOUTUBE). All these videos come with English subtitles & download options. Sign up now! Get Lifetime Access for a one-time payment of $99 ONLY! Sign up now on our website at https://members.drnajeeblectures.com/ --------------------------------------------------------------------------------------------------------------------------- Why sign up for premium membership? Here's why! Membership Features for premium website members. 1. More than 800+ Medical Lectures. 2. Basic Medical Sciences & Clinical Medicine. 3. Mobile-friendly interface with android and iOS apps. 4. English subtitles and new videos every week. 5. Download option for offline video playback. 6. Fanatic customer support and that's 24/7. 7. Fast video playback option to learn faster. 8. Trusted by over 2M+ students in 190 countries. --------------------------------------------------------------------------------------------------------------------------- ▬▬▬▬▬▬▬▬▬▬ Contents of this video ▬▬▬▬▬▬▬▬▬▬ (0:00-2:45) Definition & Outline: Gametogenesis; Oogenesis & Spermatogenesis; Meiosis & Cytodifferentiation. (2:47-10:00) Meiosis in detail: Diploid Early Germ Cells; 23 homologous chromosomes from each parent; defining homologous chromosomes; genes & alleles. (10:01-13:15) DNA replication; duplication of chromosomes; chromatids. (13:17-18:15) Meiotic division; Spermatogonia & Oogonia; haploid(1n) & diploid(2n); difference b/w "n" and "N". (18:16-24:25) Formation of double structured/diploid Primary Gamete: Primary Oocyte(2n) & Primary Spermatocyte(2n). Short recap. (24:30-29:30) Major difference between Meiosis I and Mitosis: Pairing of homologous maternal & homologous paternal chromosomes: (1) Synapsis. (29:31-34:59) (2) Cross Over; Exchange of blocks of genes b/w homologous chromosomes from each parent. (3) Chiasma; unique/recombinant genetic material. (35:00-40:40) Alignment; followed by Disjunction; random allocation into daughter cells; Creation of 2 Secondary Gametes. (40:41-46:45) Double structured homologous chromosomes (2N). Meiosis II: splitting of centromere; end of Meiosis II. Final result: 4 Haploid single structured (1N) chromosome. (46:47-51:51) Recap. Difference of second meiotic division (Meiosis II) b/w males & females. Purpose of Meiosis; genetic diversity. --------------------------------------------------------------------------------------------------------------------------- Join this channel to get access to perks: Sign up now on our website at https://members.drnajeeblectures.com/...    / @doctornajeeb   Follow us on Facebook :-   / drnajeeb   Follow us on Instagram :-   / drnajeeblectures