oogenesis

Question 1

Before birth

Answer 1

baby has millions of oogonia (2n) undergo mitosis to produce cells

Question 2

At birth

Answer 2

lots of eggs undergo the growth phase becoming primary oocytes which beings prophase one of 1st meiotic division but stop so at birth they are at the first prophase (surround by primary follicle)

Question 3

Puberty

Answer 3

Follicle growth and maturation, as it matures primary oocyte completes meiosis 1 producing 2 haploid cells unequal in size, lage is secondary oocyte with half chromosome and more cytoplasm and then small is polar body

Question 4

2nd m div

Answer 4

secondary oocyte does 2nd m div by stops at metaphase, at this point, ovulation occurs as the follicle ruptures expelling both of them

Question 5

menstruation

Answer 5

2nd osteocyte enters the fallopian tube ad if pen by sperm meiosis is completed, producing 2 haploid cells unequal in size and one is ootid which matures into ovum