Embryogenesis Flashcards
1
Q
When can cells that give rise to gametes in both males and females be identified during the 4th week of gestation? and where are they?
A
- 4th week of gestation
- Extraembryonic membrane called the yolk sac.
2
Q
Where are primordial germ cells (PGCs) thought to originate from?
A
The primitive streak
3
Q
How do PGCs migrate and where do they leave from/go
A
- Ameboid movement
- Yolk sac to the dorsal body wall
- This gives rise to the genital ridge and ultimately the gonads.
4
Q
Ovarian development occurs in the absence of what gene? and the in the presence of the _____ gene?
A
Sry gene
WNT4
