Page 38 - Biology - XII

Stages of Gamete
3 Stages of Gamete
Development
Development

EXPERIMENT 7

Objective
To study and identify stages of gamete development through permanent slide of T.S. of ovary and T.S.
of testis.

Principle/Theory
Gametogenesis means the genesis/formation/production of gametes. It takes place in gonads: Testis and
Ovary. The formation of sperms (male gametes) in testis of an animal is called spermatogenesis. The
formation of ovary (female gametes) in ovary is called oogenesis. This takes place due to meiosis.
The diff erent steps of gametogenesis in the gonads can be done by T.S. of ovary and testis. The permanent
slides are used for study.

Materials Required
Permanent slides and compound microscope

Procedure
1. Observe the slide over compound microscope.

2. Compare the comments mentioned.
3. Draw the diagram in your record fi le and write comments for each spot.

SPOT - 1

T.S. of Mammalian Testis (Mouse)

Sertoli cells

Seminiferous tubule

Interstitial cells

Spermatogonia
Spermatocytes
Spermatids

Spermatozoa

Fig. 7.1: T.S. of mammalian testis (mouse) (microscopic view)

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