Gametogenesis

Good morning dear students.
Kindly first mark your attendance.

Today we will achieve the following learning outcomes:-
Students will be able to-
1. Define Gametogenesis.
2.Explain the process of Spermatogenesis.
3.Analyse & Interpretation the Hormonal Control of Spermatogenesis.
4.Draw & label the structure of a sperm.
5.Explain the process of Oogenesis.


Kindly write your notes in your register. I am available here to clear your doubts  , so do ask your valuable questions.


GAMETOGENESIS

It is defined as the process of production of Gametes.
SPERMATOGENESIS - process of production of sperm from Spermatogonia.
OOGENESIS - process of production of Ovum from Oogonia.

The process of Gametogenesis occurs in following basic steps :-
a. MULTIPLE mitotic divisions & cell growth of precursor germ cells.
b. TWO MEIOTIC division ( meiosis 1 & 2) to produce haploid daughter cells.
c. DIFFERENTIATION of the haploid daughter cells to produce functional gametes.


In this Blog we will discuss both the process in Details.

https://images.app.goo.gl/o4cbb1JdPng3yEFG9

This link will help you understand the Spermatogenesis process in Seminiferous Tubules.

P. S. ACROSOME consists of Hydrolytic Enzymes called SPERM LYSIN. There are 3 types of sperm lysin :-

i. HYALURONIDASE - this hydrolysis hyaluronic acids of the Follicular cells.

ii. CORONA PENETRATING ENZYME - dissolvesthe corona radiata portion around the secondary oocyte by Hydrolysing their ground substances.

iii. ZONA LYSINE / ACROSIN- helps to digest the zona pellucida.

All this helps the sperm to reach the plasma membrane of the ovum.

https://images.app.goo.gl/o6TCNPYioQAVDJED9

This link will show you T. S of ovary with all the stages of OOGENESIS.

I will be also sending you a YouTube video link for better understanding of the process.

The Female Hormonal Control is a bit complicated which I will cover on 9th April according to Day 1 Time table.
Till then ask your doubts. These are very important parts of this chapter  for BOARD EXAMS.