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Showing posts with label cloning. Show all posts
Showing posts with label cloning. Show all posts

Friday, 24 December 2010

Besides Cloning, there is Parthenogenesis

Recently, I learnt a new word - Parthenogenesis.

I know cloning means reproducing a life without the use of a fertilised egg.  No 'male' is involved.  How it works: The nucleus of an unfertilised egg is removed.  It is then fused with the nucleus of a donor cell (which has DNA and a full set of genetic material).  The fused cell develops into an embryo and thence a new life.

Only a few weeks ago I learnt about Parthenogenesis - another reproduction process which does not require fertilisation by males.  How it works:  A female egg X splits into four cells, three cells were discarded. Another female egg Y splits into four cells, three cells were discarded.  The remaining X cell combines with the remaining Y cell, giving rise to offspring which has all the genetic material from the mother.

Only recently I learnt that cloning and Parthenogenesis sometimes take place naturally in nature.  Bynoe Gecko is an all-female species which clones themselves.  Leiolepis Ngovantrii lizards reproduce by cloning. A boa constrictor (snake) recently gave birth to litters of all-female babies without contact with any male boa.  The New Mexico Whiptail reproduces solely through Parthenogenesis.  A Hammerhead shark in captivity was observed to reproduce through Pathenogenesis, having no contact with males.

I find all these new discoveries amazing.  I know so little.  Human beings know so little.  SOMEONE must have created all these.