question_answer

What is gametogenesis? Differentiate between isogamy and anisogamy.

OR

Differentiate secondary sexual characters in male and female?

 

Answer:

Gametogenesis is the formation of two types of gametes - male and female which are haploid cells. The main difference between isogamy and anisogamy are as follows :

	bogamy	Anisogamy
1.	Isogamy is the fusion of two gametes which are similar in appearance.	Anisogamy is the fusion of two morphologically dissimilar types of gametes.
2.	The gametes are so similar that it is very difficult to differentiate male and female gametes.	Gametes can easily differentiated into male & female gametes.
3.	Such gametes are called isogametes or homogametes.	Such gametes are called heterogametes or anisogametes.
4.	Example : Monocystis, Chlamydomonas	Example : Humans and frogs

OR

	Secondary sex characters in male	Secondary sex characters in female
1.	Body is more muscular and stronger.	Body is less muscular and weaker.
2.	Beard, moustaches and chest hair are present.	Beard, moustaches and chest hair are absent.
3.	Mammary glands are poorly developed.	Mammary glands (breasts) are very well developed.
4.	Pelvis is narrow.	pelvis is broad.
5.	Larynx is more apparent.	Larynx is less apparent.