#medicines #drnajeeb #pharmacology #medicaleducation #drnajeeblectures #meiosis

Meiosis | Dr Najeeb

Like this video?
Sign up now on our website at [ Ссылка ] 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 [ Ссылка ]
---------------------------------------------------------------------------------------------------------------------------
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 [ Ссылка ]
[ Ссылка ]
Follow us on Facebook :- [ Ссылка ]
Follow us on Instagram :- [ Ссылка ]

свернуть