Meiosis Dr Najeeb

############################# Video Source: www.youtube.com/watch?v=D_2xGUVUGw4

#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

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