Ovulation & Oogenesis

[Eye Cue]

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If someone could help me, it would be very much appreciated!

I am just trying to connect everything together, and this is where I am stuck:

..........--> Diploid primary oocyte --Meiosis I--> haploid secondary oocyte --prophase II, metaphase II--> corpus luteum... and from there, if fertilization occurs, it will continue down anaphase II & telophase II to make a diploid zygote... or if no fertilization, then luteolysis to form the corpus albicans.

I can't seem to fit in exactly where ovulation occurs. Would it occur before prophase II? Maybe interkinesis?

Oogenesis/metaphase II isn't quite my cup of tea, but I am trying to improve. If any of the steps I mentioned are wrong, please call me out on it because I don't want to go on thinking the wrong thing. Thanks!

 

[RogueUnicorn]

the corpus luteum forms at ovulation. it's the leftovers from the follicle.

edit: i can't comment on the particular steps.. seems correct to me, but i'm kind of fuzzy on the specifics. to be honest i don't think this amount of detail helps you on the mcat.

 

[Charles_Carmichael]

If someone could help me, it would be very much appreciated!

I am just trying to connect everything together, and this is where I am stuck:

..........--> Diploid primary oocyte --Meiosis I--> haploid secondary oocyte --prophase II, metaphase II--> corpus luteum... and from there, if fertilization occurs, it will continue down anaphase II & telophase II to make a diploid zygote... or if no fertilization, then luteolysis to form the corpus albicans.

I can't seem to fit in exactly where ovulation occurs. Would it occur before prophase II? Maybe interkinesis?

Oogenesis/metaphase II isn't quite my cup of tea, but I am trying to improve. If any of the steps I mentioned are wrong, please call me out on it because I don't want to go on thinking the wrong thing. Thanks!

Ovulation occurs after metaphase II. You're right about the fate of the corpus luteum: fertilization maintains the corpus luteum while no fertilization results in its degeneration and the formation of the corpus albicans.

 

[Eye Cue]

Thank you!
I know that the MCAT has been increasing the proportion of genetics, so I've been trying to study accordingly.