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Comparative Outline of Oogenesis and Spermatogenesis

Oogenesis

 

Spermatogenesis

Oogonium

(female germ cell)

 

Spermatogonium

(male germ cell)

Germ cells committed

to Meiosis

Primary Oocyte

 

Primary Spermatocyte

First Meiotic Division

Secondary

Oocyte

First Polar

Body

 

Secondary

Spermatocyte

Secondary

Spermatocyte

 

Second Meiotic Division

Ovum and

Second Polar Body

   

4 Spermatids

   

1 Ovum

( 1 viable gamete)

 

4 Spermatozoa

( 4 viable gametes)

Return to Gametogenesis Index

Go on to Oogenesis: Mammalian Ovary


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Send comments to:
Sandra K. Ackerley (ackerley@uoguelph.ca),
Department of Zoology, University of Guelph, Guelph, Ontario, Canada N1G 2W1.

Latest page update: April 11, 2000.