Summary Topic 3 Gametes and Fertilisation

Gametes and Fertilisation
mammalian gametes I haploid
Female-own , oocyte -
> produced in the Ovaries
S.I units Male-Sperm , spermatazon - produced inhe testes


Fertilisation occurs in the
fallopian tubes seminiferous
tubule



Sperm
Acrosome membrane bound organdle ,
containing
-




hydrolytic enzymes for breaking he
down Zona


pellucida of the over
nucleus haploid
aerobic
Lots of mitochondria ATP for respiration
for
-




for flagellu

Flagellum provides the motility to swim

Stream lined in to travel
small :easier
order
to more
faster
.
towards the orum




Oocyte -
nucleus :
haploid
ollicular cells
-

corona radiata :

of surrounding , involved in

signalling
hormones
to he sperm
involved
.

in
Progesterone
chemotaxis
and other




pellucida coat) layer below
zona
(jelly glycoprotein
-




corona radiata
layer- that the has to
sperm
penetrate and involved in
preventing polysperming
· Largecellincreases surface see




Catical
granules involved preventing polysperming
incontain
-




;
enzymes
which
modify zona pellucida .