Oogenesis

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  • Created by: Saoirse
  • Created on: 22-12-14 10:50
During fetal development meiosis 1 begins but stops in prophase
Oogonium (2n) >>>> Primary oocyte (2n)
1 of 6
After puberty, primary oocytes complete meiosis 1, which produces a secondary oocyte and a first polar body which may or may not divide again
Primary oocyte (2n) >>>> secondary oocyte (n) + first polar body (n)
2 of 6
Secondary oocyte begins meiosis 2 but stops in metaphase
Secondary oocyte
3 of 6
A secondary oocyte and first polar body are now ovulated
Secondary oocyte
4 of 6
After fertilisation, meiosis 2 resumes. Oocyte splits into an ovum and second polar body
Sperm (n) + Secondary oocyte (n) >>>> Ovum (n) + second polar body (n)
5 of 6
Nuclei of sperm and ovum unite, forming a diploid zygote
Ovum (n) + sperm (n) >>>> zygote (2n)
6 of 6

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Card 2

Front

Primary oocyte (2n) >>>> secondary oocyte (n) + first polar body (n)

Back

After puberty, primary oocytes complete meiosis 1, which produces a secondary oocyte and a first polar body which may or may not divide again

Card 3

Front

Secondary oocyte

Back

Preview of the back of card 3

Card 4

Front

Secondary oocyte

Back

Preview of the back of card 4

Card 5

Front

Sperm (n) + Secondary oocyte (n) >>>> Ovum (n) + second polar body (n)

Back

Preview of the back of card 5
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