Size of Y Chromosome

My point was, we all know that microbes treated half heartdly will
become more virulant very fast they tend spread so if one think that
geting partial balance with immunity & virusis is not long lasting
there is very big chance that more of rabbit will come with virulant
strains very soon

One more point how time does virulant strains take to kill rabbit can
very small small.


Regarding imunity by less virulant strains may not be always
advantages for more virulant strains,


I think there are many intermiadiate level problems are there which
also are needed for balance. Only a wlid card of death of rabbit may
not do everthying for decreasing virulance


Regarding Y chromsome I will give better expanation I think my
posting
was less comprehensive


Please check out this
http://www.learner.org/channel/courses/biology/textbook/gender/gender...
http://www.npr.org/templates/story/story.php?storyId=4225769&sc=emaf
I read that size of Y chromosome has reduced because it did not have
partner at all. but X chromosome has not reduced, they say that it is
because, it has partner in female sex to recombine.
If Chromosome don't get partner to recombine than there is tendency
to
delete genes which may be harmful produced by mutation. which intern
will reduce the size of chromosome is the logic.
Now if X chromosome gets only 50% chances to recombine then I think
size of X chromosome should also reduce to a size in between Y and
its
initial size in reptiles
If gene deletion by natural selection if it is correct why there is
preservation of X chromosome size when it has only 50% Chance to
exchange with its real partner. It should also have 50% disadvantage.
How is this?
This is my guess. Please comment


.

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