FERTILIZATION

Question 1

when does the fertilization begins?

Answer 1

gamete fusion (zygote formation)

Question 2

when does the fertilization ends?

Answer 2

initiation of zygote cell division or cleavage

Question 3

where does the fusion of spermatozoon with oocyte takes place?

Answer 3

uterine tube

Question 4

process by which the spermatozoon and egg unite

Answer 4

fertilization

Question 5

Fertile life of cattle (Sperm & Ovum)

Answer 5

30-48
20-24

Question 6

Fertile life of horse (Sperm & Ovum)

Answer 6

72-120
6-8

Question 7

Fertile life of Rabbit (Sperm & Ovum)

Answer 7

30-36
6-8

Question 8

Fertile life of sheep (Sperm & Ovum)

Answer 8

30-48
16-24

Question 9

Fertile life of Swine (Sperm & Ovum)

Answer 9

24-72
8-10

Question 10

In birds, the transport of sperm to the female genital tract is involved with copulatory organs in male which called?

Answer 10

Cloacal Kiss

Question 11

Site of ejaculation in Sheep

Answer 11

Cranial Vagina

Question 12

Site of ejaculation in Cow

Answer 12

Cranial Vagina

Question 13

Site of ejaculation in Horse

Answer 13

Uterus

Question 14

It reduces the retrograde sperm loss in Swine

Answer 14

Coagulum

Question 15

What seminal fraction forms the coagulum?

Answer 15

Final Fraction (post sperm)

Question 16

Seminal fraction in pigs that is sperm rich

Answer 16

Second Fraction

Question 17

Seminal fraction in horse that is sperm rich

Answer 17

First fraction

Question 18

Phase of transportation that is associated with muscular contraction of tract following coitus

Answer 18

Rapid phase

Question 19

Phase of transportation where spermatozoa is transported to oviducts from cervix

Answer 19

Slow phase

Question 20

Major barrier and is a reservoir of sperm

Answer 20

Cervix uteri

Question 21

convulated system of folds and grooves in cervix in Ruminant is called?

Answer 21

Cervical crypts

Question 22

What happens when there is a change in viscosity if cervix from high to low?

Answer 22

This changes gives the sperm more privileged pathways for easy movement

Question 23

This process is important in the maturation of the sperm as well as preparation for fertilization and penetration to an egg cell

Answer 23

Capacitation

Question 24

what are the Important processes during capacitation

Answer 24

• Removal of glycoprotein layer and seminal plasma
• Alteration of acrosomal cap area allows → acrosome reaction
• Alterations in flagellar motility
• Development of the capacity of the sperm to fuse with the plasma membrane with the oocyte

Question 25

what causes the break down of hyaluronic acid that binds the cumulus cells together?,

Answer 25

Sperms’ vigorous motility and release of hyaluronidase

Question 26

multiple sperm penetrating to a oocyte

Answer 26

polyspermy

Question 27

The first contact between sperm and zona pellucida is through?

Answer 27

Adhesion

Question 28

Sperm binds to ZP3 with is a?

Answer 28

Glycoprotein receptor molecule

Question 29

the binding of sperm to ZP causes acrosome reaction that is due to the release of?

Answer 29

hydrolytic enzyme that permits penetration

Question 30

it hydrolyze ZP proteins that enhances the ability of spermatozoa to bind to these protein

Answer 30

Acrosin

Question 31

Inactive form of acrosin

Answer 31

proacrosin

Question 32

fertilizing sperm that is engulf by the oocyte

Answer 32

syngamy

Question 33

what terminates the meiotic arrest?

Answer 33

the increase of cytosolic calcium ion concentration

Question 34

secretory granules that aids in the block to polyspermy

Answer 34

cortical granules

Question 35

What happens when there is a change in vitelline membrane of oocyte in rabbits?

Answer 35

prevents the entry of spermatozoa

Question 36

Involves opening of sodium channels im egg plasma membrane

Answer 36

Fast block