Wednesday, April 27, 2011

Differences between Male and Female Gametes

Recently in Term 2, under the Biology topic of Reproduction in Animals, I learned about the two different animal gametes, the sperm and the egg. I have thus come up with a comparison chart between the two gametes to give myself, as well as others a better understanding of the two gametes of the male (sperm) and female (egg).


Criteria for Comparison
Female Gamete
Male Gamete
Amount of cytoplasm
A lot of cytoplasm to provide nourishment for embryo 
 Little cytoplasm to decrease weight to enable it to move faster
 Shape
Spherical
Streamlined so that there is less resistance in swimming towards ovum 
 Presence of  tail
 No tail, non-motile since it is swept along oviduct by cilia/peristaltic contraction of muscles of oviduct movement not necessary
 Has a tail/flagellum/motile to allow it to swim in the egg
Amount per release
Only one is released per month
Released/produced in larger/greater number
To ensure survival/ due to high mortality rate in vagina
To ensure successful fertilization
Jelly coating
Contains jelly coat that contain receptor for the sperm to bind
Jelly coat/ zona pellucida
Acrosome Level
No Acrosome
Contains Acrosome that contains enzymes that breaks down layers surrounding egg
Mitochondria Level
Contains few mitochondria as it is non-motile, thus requiring less energy
Contains many mitochondria to provide the sperm with energy to swim

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