Gametogenesis 2 Flashcards
1
Q
2 types of eggs
A
Alecithal (mammals)
Telolecithsl (bird)
2
Q
Chrs dotation DOG
A
78
3
Q
Chrs dotation CAT
A
38
4
Q
Chrs dotation Equine
A
64
5
Q
Chrs dotation Cow
A
60
6
Q
Chrs dotation Goat
A
60
7
Q
Chrs dotation Sheep
A
54
8
Q
Chrs dotation pig
A
38
9
Q
Where fecundation happen?
A
Ampulla amd Infudibulum (poultry )
10
Q
Spermatozoa Penetration (spermatozoa activation)
A
- Adherence to ZP
- Acrosome reaction= realise hydrolic enzyme that dogest ZP and corona radiata
11
Q
Spermatozoa pernetration (oocyte activation )
A
- Fusion membrane
- Block polyspermy= cortical reaction (block entrance of more sperm)
12
Q
Fecundation consequences
A
Restauration nb chrs diploid
New embryo en dvt
13
Q
Factor affecting fecundation
A
Sperm vitality, nb, concentration
Occyte vitality
14
Q
Germinal period steps
A
- Segmentation/cleavage
- Morulation (16 blactomeres)
- Blastulation
15
Q
2 type cleavage
A
Meroblastic (partial) fosh reptile bird
Holoblatic (total) mammals
