Process of Oogenesis
Germ cells
I mitosis
Oogonia
I
Primary oocyte
I (46, XX)
Maturation of graafian Follicle
I Completion of 1st meiotic (meiosis) division.
Unequal sharing distribution of cytoplasm
I produce one large cell and one small cell
Secondary oocyte 1st polar body
(Ovum) (23, X), Haploid (23,X ), can’t under go fertilization
I Ovulation
Not fertilized; degenerates within 24 hours.
Fertilized; completion of 2nd meiotic (meiosis) division.
I
Female pronucleus Second polar body (23,X), can’t undergo fertilization
After process of fertilization, egg and sperm fuse to make a cell with 46 chromosomes (23 pairs), called a zygote.
