Bio oogenesis question

[datstudy1]

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There are two ways of looking at this:

oogonium (2N), primary oocyte (2N), secondary oocyte (1N), and ovum (1N)...OR

oogonium (2N), primary oocyte (4N), secondary oocyte (2N), and ovum (1N)

For the purposes of the DAT, which is it?

 

[datstudy1]

Bump