Fertilization begins with the collision of an egg and sperm, ends with the formation of a zygote cell, and occurs in the ampullary part of the uterine tube. The sperm penetrates the egg's protective layers, and the male and female pronuclei within the egg then fuse, restoring the diploid number of chromosomes and determining the sex of the future embryo.

2.  Fertilization is the process of fusion of the
spermatozoon with the mature ovum
Begins with the sperm egg collision
Ends with production of mononucleated single cell
called Zygote

4.  To initiate embryonic development of the egg
 To restore chromosome number of the species
Place
 Ampullary part of the uterine tube

5. Approximation
Of The
Gametes
Contact And
Fusion Of
The Gametes
Completion
Of The
Second
Meiotic
Division
Sex
Determination

6. Sperms travel to the ampullary part
Transported to ampullary part
Ovum is picked up by tubal fimbriae

7. Zona reaction and oolema block
One sperm touches the oolema
Penetration of zona pellucida
Complete dissolution of corona radita cells
Sperms liberate hyaluronidase from acrosomal cap

8. Oocyte
 Immediately follows
second meiotic division
in the oocyte
 Each contain haploid
number of chromosomes
 Bigger one is called
female pronucleus
 Smaller one is called the
second polar body
 Both head and tail enters
the cytoplasm of the
oocyte
 Head and neck become
the male pronucleus
contains haploid
chromosomes
Sperm

11.  The male and female pronuclei unite at the center with
diploid number of chromosomes (46)
 The zygote contains both maternal and paternal
genetic materials
 Sex of the child is determined by the pattern of the sex
chromosome supplied by the spermatozoa
 If X- Female Embry (46XX)
 If Y- Male Embryo(46XY)