Which diagram correctly displays the order of events during egg formation?
primary oocyte ® secondary oocyte meiosis i ® meiosis ii ® ovum
o ovum ® meiosis iⓡ primary oocyte meiosis ii ® secondary oocyte
o primary oocyte meiosis l ® secondary oocyte meiosis ii ® ovum
o primary oocyte meiosis i ® ovum ® meiosis ii ⓡ secondary oocyte

The order of events during egg formation:

Primary oocyte - meiosis l - secondary oocyte - meiosis II - ovum

Explanation:

The process of egg formation is called oogenesis. During oogenesis the primary oocyte is formed when oogonia arrest at prophase-I of meiosis I.  Further division of primary oocyte is arrested.

At puberty the primary oocyte, a diploid cell divides to form one haploid secondary oocyte and one polar body. Thus, at the end of meiosis I one secondary oocyte is formed, after meiosis II secondary oocyte forms ovum.  

Explanation:

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