Information on Reproductive System

What is Meiosis?

Cell division that produces gametes

What are meiosis (1st phase) division

metaphase I, anaphase I, telophase I

What happens in anaphase I

chromosome pair seperate and move to opposite poles

Telophase I

Separates chromosomes reach opposite poles, cell begin to split

What is happening with Meiotic Division

two rounds (meiosis 1 and 2)

Spermatogenesis

development of male gametes

Tell me about spermatogenesis hormones

FSH

LH

testosterone

What are the 3 stages for spermatogenesis

spermatocytogenesis

Meiosis

Spermiogenesis

Mitosis in spermatogensis

involves spermatogonia, serve to provide supply for immature germ cells

meiosis in spermatogenesis

group of spermatogonia that give rise to primary spermatocytes, enter meiosis

The first meiotic division produces

secondary spermatocytes

The second meiotic division is going to

give rise to spermatids

Spermimogenesis

transforms spermatids into spermatozoa and changes cell structure

most lose cytoplasm, condense nuclei, and develop flagellum

Oogenesis (female gamete)

begins in female prior before birth, long lap periods, oogonia differentiate and enter meiosis, oogonia goes in the ovary

Oogenesis hormones are

FSH, LH, estrogen, progesterone

Major events of oogenesis process

Prenatal life: oogonia undergo mitotic division, oogonia differentiation, giving rise to primary oocytes, and primary oocytes enter meiosis and arrest in prophase of first meiotic division

Post natal life in oogenesis

before ovulation the primary oocyte completes first meiotic division,

giving rise to secondary oocyte,

it enters second meiotic division but is held in metaphase II:

if fertilization doesn't occur: the secondary oocyte degenerates,

fertilization occurs: oocyte will complete second meiotic division, giving rise to an ovum