Genetics Oddities Thread

[GlicksChicks]

Rare siamese twins. Would've been identical twins if the embryo split successfully into two.

Is it possible for it to ever successfully split in two?

 

[MysteryChicken]

Is it possible for it to ever successfully split in two?

Yes, but rare. Chicks most likely will die in shell due to limited space.

 

[MysteryChicken]

Chick oversized, cramped in shell. It died.
This was an experimental meatie. Working on giant sustainable meatbirds.

 

[GlicksChicks]

Yes, but rare. Chicks most likely will die in shell due to limited space.

I would think so, the egg sometimes isn't even big enough for one chick.

 

[my spoiled chickens]

I have a duck with dichromatic eyes. A lighter brown, with some blueish grey specs. Half Mallard and half Call, her sire is blue eyed, and the right eye has some brown in it. The mother and sibling have typical brown eyes.

YES! Someone who actually knows about eye genetics!

 

[MysteryChicken]

YES! Someone who actually knows about eye genetics!

I know alittle, but with chickens.

 

[my spoiled chickens]

I know alittle, but with chickens.

I know about it because I did a study on pygment and melanin in humans and a lot of it coralates to animals aswell

 

[MysteryChicken]

I know about it because I did a study on pygment and melanin in humans and a lot of it coralates to animals aswell

Chicken eye color genetics are actually less understood. Very few studies are actually available.
The only one I was able to find had to do with brown, or dark brown eyes. Brown, or dark brown eyes are influenced by extra Melanizers, some of which are linked to the chickens plumage color, like black.

 

[Amer]

Pearl eyes are caused by a recessive gene.
Brown eyes is theorized to be gene but I can’t remember if it is dominant or recessive. There is some discourse here. It proved my theory wrong, and showed that brown eyes are more complicated then we can imagine.
https://www.backyardchickens.com/threads/theory-ml-and-id-cause-brown-eyes-in-chickens.1590476/
Dichromatic eyes don’t really exist in chickens (unless you count both brown and red eyes, but this is caused by melanizers. In turkeys and ducks, (geese too I think) birds can have both brown and blue eyes. This is caused by white spotting or recessive white, very similar to the blue eyes causes in cats.
However, in turkeys blue eyes sometimes occur in birds without any white spotting, and nobody knows the nature of the genetics causing them.

 

[MysteryChicken]

Pearl eyes are caused by a recessive gene.
Brown eyes is theorized to be gene but I can’t remember if it is dominant or recessive. There is some discourse here. It proved my theory wrong, and showed that brown eyes are more complicated then we can imagine.
https://www.backyardchickens.com/threads/theory-ml-and-id-cause-brown-eyes-in-chickens.1590476/
Dichromatic eyes don’t really exist in chickens (unless you count both brown and red eyes, but this is caused by melanizers. In turkeys and ducks, (geese too I think) birds can have both brown and blue eyes. This is caused by white spotting or recessive white, very similar to the blue eyes causes in cats.
However, in turkeys blue eyes sometimes occur in birds without any white spotting, and nobody knows the nature of the genetics causing them.

I know pearl eyes are caused by a recessive gene.
My Taiwans have hazel eyes, it gives them a greenish appearance. Think it's caused by blue, or pearl under brown, or normal bay color.