Peafowl... Genetics Question... thanks for the help...

[NateinFL]

Yeah if you read up on it about bird genetics, which is what I did to better understand sex linked mutations, you will find that birds are OPPOSITE of what you have learned about humans and mammals. MALES are XX and FEMALES are XY. What some people will do is refer to it as ZZ and ZW like Kev said. The misleading article on UPA surprises me as I thought they would know and that really got me doing research and I concluded that Kev is right, UPA was wrong...you can Google sex-linked traits in birds and there are very helpful diagrams out there that make it easy to understand.

 

[deerman]

Yes the male has the xx hen xy , thats in birds . Mammals the female are xx and males xy.

Female birds are easy to produce in sex link colors.

The article is very old , before the other 3 sexlink colors were bred

1. Only males birds can be split to sex link colors.
2. If you get a sex link color from a normal color pair, then the male is split and the bird will be a female.
3. Only way to get a male sex link color , is with a sex link color hen X male sex link or male split sex link color.

reason you see ,cameo ,peach, and purple hens are cheaper than the males.

 

[Kev]

OK here's my attempt at visualization. Please forgive my poor drawing skills..

First, here are bird the bird sex chromosomes look like.. males are XX and females XY on top of this:

The male XX are both the same size to each other. The female's X is also same size as the male's X.. however her Y is much smaller. It is literally missing whole chunks, so it is smaller- and this is important- also has much fewer genes(loci) on it..

I've made up a demo of where the Cameo gene is located.. chose it at random for illustration purposes only, but the concept will be the same, regardless. I've marked the Cameo gene in yellow and located it on the upper left arm of the chromosome X. In the bottom of the above picture shows the chromosomes of a Cameo male and female. Notice the cameo male has TWO cameo genes. The female can ever have only one cameo gene at the most.. because her Y is missing the part of the arm where the Cameo gene is located.. I've put the yellow mark above her Y gene so you can see how it's not possible for a hen to EVER be split cameo.. she doesn't have that part on the Y gene. It's gone. Bye. Not there. That is how all sex linked genes work.

Now the second illustration shows how the chromosomes of a cameo and blue split cameo males might look like across the top.. and a cameo female and blue female on bottom:

 

[texascowboy1979]

I see the problem now.. I was un aware about birds ZZ Zw... and took for granted everything I know about Human and animal DNA

Now that you've shown me the NEXT page "in DNA if you will".. I was able to come up with this and I belive that it should solve the problem... Correct?

By breedergenetics at 2010-05-21

By breedergenetics at 2010-05-21

 

[texascowboy1979]

So... Considering I have a cameo Hen and IB Males...

This should happen... correct?

My Hen

By Breedergenetics at 2010-05-21

The Pair

By Breedergenetics at 2010-05-21

Offspring

By breedergenetics at 2010-05-21

 

[deerman]

Quote:
Correct !!!!!!!!

 

[NateinFL]

Has anyone considered letting the UPA know about their misprint? I'm not a member so I figured one of the members would like to bring it to their attention. I find genetics very interesting and I'm glad we are all at this point VERY familiar with sex-linked traits

 

[texascowboy1979]

No kidding.. and here I thougth I was down on all the Genetics part... and Im finally Glad i understand Sexlinked Traits...