SEQUENCE OF
E FEVENTS
F E C T I VIN
E W AYS
THE
OF STUDYING
DEVELOPMENT OF
B THE
EFOR E E
EMBRYO.X A M S
GAMETOGENESIS
The process whereby a haploid cell (23
chromosomes) is formed from a
diploid cell
(46 chromosomes) through meiosis
and cell differentiation
SPERMATOGENESIS
In males, this process is called
spermatogenesis and produce spermatozoa
(sperm)
The process begins at puberty when the
germline epithelium of the seminiferous
tubules divides by mitosis
These cells (spermatogonia) then
undergo a period of cell growth,
becoming spermatocytes
The spermatocytes undergo two meiotic
OOGENESIS
divisions to form four haploid daughter In females, this process is called
cells (spermatids) oogenesis and produce ova (eggs)
The spermatids then undertake a process
of differentiation in order to become The process begins during foetal
functional sperm cells (spermatozoa) development
will undergo meiosis, becoming primary
oocytes
The primary oocytes remain arrested in
prophase I until puberty, when a girl
E FEVENTS
F E C T I VIN
E W AYS
THE
OF STUDYING
DEVELOPMENT OF
B THE
EFOR E E
EMBRYO.X A M S
GAMETOGENESIS
The process whereby a haploid cell (23
chromosomes) is formed from a
diploid cell
(46 chromosomes) through meiosis
and cell differentiation
SPERMATOGENESIS
In males, this process is called
spermatogenesis and produce spermatozoa
(sperm)
The process begins at puberty when the
germline epithelium of the seminiferous
tubules divides by mitosis
These cells (spermatogonia) then
undergo a period of cell growth,
becoming spermatocytes
The spermatocytes undergo two meiotic
OOGENESIS
divisions to form four haploid daughter In females, this process is called
cells (spermatids) oogenesis and produce ova (eggs)
The spermatids then undertake a process
of differentiation in order to become The process begins during foetal
functional sperm cells (spermatozoa) development
will undergo meiosis, becoming primary
oocytes
The primary oocytes remain arrested in
prophase I until puberty, when a girl
