When the oocyte goes through meiosis one it separates into a secondary oocyte and a 1st polar body, this first polar body has one chromosome (shown in the diagram by ’n’) but then it divides into two separate cells with one chromosome (n) is this material ’n’ duplicated or is the genetic material of the 1st body divided into two?
If the Secondary oocyte doesn’t undergo fertilization, does it still separate into the 2nd polar body and the Ootid?
Hi prof, I can’t seem to play the Embryology A lecture for some weird reason (the rest of the lectures work).
Hmm… not sure what it is. Can you try FireFox (or some other browser?). Or try this link.
When the oocyte goes through meiosis one it separates into a secondary oocyte and a 1st polar body, this first polar body has one chromosome (shown in the diagram by ’n’) but then it divides into two separate cells with one chromosome (n) is this material ’n’ duplicated or is the genetic material of the 1st body divided into two?
If the Secondary oocyte doesn’t undergo fertilization, does it still separate into the 2nd polar body and the Ootid?
Yeah, the first polar body is best described as “1n/2x” because it’s genetically the same as the secondary oocyte, just without all the cytoplasm.
If the secondary oocyte is not fertilized, it does not complete meiosis II and doesn’t become an ovum. (e.g. see https://en.wikipedia.org/wiki/Oogenesis)