Summary
BBS1005 summary of case 1 should we worry
- Course
- Institution
full summary of case 1 should we worry
[Show more]
Seller
Follow
farahahssan
Reviews received
Content preview
Case 1: Should we worry?, 1. What is Gametogenesis?
Gametogenesis: is the process that converts primordial germ cells to mature
male(spermatozoa) and female gametes(oocytes). Gametogenesis consists of 4 phases:
1. The migration of germ cells (identical in males and females)
2. The increase of primordial germ cells via mitosis
3. The reduction of chromosomes number via meiosis
4. The maturation of the eggs and spermatozoa
1. Migration of germ cells:
Primordial germ cells (PGC) are the precursors of the gametes, they exit from the
yolk sac into the hindgut and migrate to the primordia of the gonads.
2. Increase of primordial germ cells via mitosis:
When PGC reach the gonads they start a phase of rapid mitotic proliferation.
Oogonia go through a period of intense mitotic activity in the ovary from the 2nd
to the 5th month of pregnancy. (from few thousand to 7 million)
For spermatogonia mitosis starts early in the embryonic testes. Male germ cells
maintain the ability to divide throughout postnatal life.
Mitosis: is the process whereby one cell gives rise to 2 identical cells, each with a complete
complement of 46 chromosomes.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller farahahssan. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $3.20. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
53068 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now