Calico Cats!

http://catsarenotpeas.blogspot.com

Very interesting, only a small percentage of calico cats are male!

wrote in message
ps.com...
http://catsarenotpeas.blogspot.com

Very interesting, only a small percentage of calico cats are male!


Yes, according to the article only one in 3000 calico cats are male.

jofirey wrote:
wrote in message
ps.com...
http://catsarenotpeas.blogspot.com

Very interesting, only a small percentage of calico cats are male!


Yes, according to the article only one in 3000 calico cats are male.



So... do they reproduce by fission ?

On Mon, 24 Sep 2007 21:31:18 +0200, Sjouke Burry wrote:

jofirey wrote:
[quoted text muted]
So... do they reproduce by fission ?

Girl cats get one X chromosome from momcat and one from dadcat. In the
case of calico and tortie cats, one of those chromosomes carries the black
gene and one carries the orange gene.

From http://www.petplace.com/cats/why-are...le/page1.aspx:

The story is different for male cats. Males have only one X chromosome,
and it is never inactivated. Whatever color gene is present on this X
chromosome will determine the color of the cat. Males can be calico or
tortoiseshell only if they are born with 2 X-chromosomes and a Y (XXY),
allowing one X to be inactivated. This genetic defect (XXY) is very rare.

Also:

It is difficult to breed specifically for calico or tortoiseshell cats.
Breeding an orange cat to a black cat may increase the chances, but it all
depends on whether the kitten is female and at what stage during
development the X-chromosome becomes inactive. There is no way to predict
or force an X chromosome to inactivate at a certain point in development.

"Sjouke Burry" wrote in message
...
jofirey wrote:
wrote in message
ps.com...
http://catsarenotpeas.blogspot.com

Very interesting, only a small percentage of calico cats are male!


Yes, according to the article only one in 3000 calico cats are male.



So... do they reproduce by fission ?

Its just the way Calico's develop. Its very nearly a sex linked
characteristic. Almost to the degree that all female cats are female. To
be calico a cat has to have two X chromosomes. Girls are XX and boys are
XY. In very rare circumstances you will have a male that is XXY. But even
then it would be unlikely to end up a calico unless there were strong
determining factors on the female line.

Jo

On Sep 24, 8:56 pm, "jofirey" wrote:
"Sjouke Burry" wrote in message

...

jofirey wrote:
wrote in message
oups.com...
http://catsarenotpeas.blogspot.com

Very interesting, only a small percentage of calico cats are male!

Yes, according to the article only one in 3000 calico cats are male.

So... do they reproduce by fission ?

Its just the way Calico's develop. Its very nearly a sex linked
characteristic. Almost to the degree that all female cats are female. To
be calico a cat has to have two X chromosomes. Girls are XX and boys are
XY. In very rare circumstances you will have a male that is XXY. But even
then it would be unlikely to end up a calico unless there were strong
determining factors on the female line.

Jo

Lacey says it is feline magic and has nothing whatsoever to do with
genetics. She says she would explain the magic but then she would have
to scratch you and she doesn't want to do that so please, just accept
that it is magic and therefore she is magical.

shrug
Julie

"GaDragonfly" wrote in message
ups.com...
On Sep 24, 8:56 pm, "jofirey" wrote:
"Sjouke Burry" wrote in message

...

jofirey wrote:
wrote in message
oups.com...
http://catsarenotpeas.blogspot.com

Very interesting, only a small percentage of calico cats are male!

Yes, according to the article only one in 3000 calico cats are male.

So... do they reproduce by fission ?

Its just the way Calico's develop. Its very nearly a sex linked
characteristic. Almost to the degree that all female cats are female.
To
be calico a cat has to have two X chromosomes. Girls are XX and boys are
XY. In very rare circumstances you will have a male that is XXY. But
even
then it would be unlikely to end up a calico unless there were strong
determining factors on the female line.

Jo

Lacey says it is feline magic and has nothing whatsoever to do with
genetics. She says she would explain the magic but then she would have
to scratch you and she doesn't want to do that so please, just accept
that it is magic and therefore she is magical.

shrug
Julie


Molly agrees.