Need help understanding Serama genetics

[The Birb King]

I have 7 adult Seramas currently, 2 roosters and 5 hens. A little over a month ago one of my Serama hens went broody and was sitting on 3 eggs. The first 2 that hatched were chocolate, which is no surprise considering one of my hens was chocolate. Then the third one hatched, and it was all yellow with one black dot on its head. Of course, yellow chicks normally grow up to be white, but I do not have any pure white Seramas so I was really exited to have a yellow one and curious of what it would grow up to be. Of course, nothing good lasts though. Because even though the hen that hatched them was a good mother to the first 2, she decided she didn't like the yellow one and attacked it and killed it. Obviously I was disappointed and angry at her, and I took the other 2 chicks away and raised them in the brooder. They are now over a month old and another broody hen is raising them. So 3 weeks ago I decided I wanted to try to get some more yellow chicks, so I separated my 2 lightest Seramas (Tiny Tom and Hershey) who I THOUGHT were the parents of that yellow one but I guess not. Tiny Tom has to be the dad, but I'm who the mom is. I seperated those 2 in their own pen for a few days and collected Hershey's eggs. I also collected a few random eggs from the other Seramas, so 7 Seramas eggs and 4 Marans eggs wnt into the incubator. Yesterday was hatch day, and I didn't get a single yellow Serama chick. I ended up with 2 black ones and 4 that are like grey and brown. I'm assuming the grey and brown ones are Hershey's children since most of the eggs were hers and they are the lightest, but I still need to figure out who the mother of that yellow chick was. I will attach pics of all my adult Seramas.

Tiny Tom

Hershey

Cookie

Cindy

Small Sofia

Miniscule Maddy (the one that killed the yellow chick)

Skippy

And that's everyone

 

[The Birb King]

I feel like if Hershey isn't the mother, then it must be Cookie. But it doesn't make much sense that 2 black and white chickens would make a pure white?

 

[The Birb King]

Oh and these are the new Seramas chicks that hatched

 

[Ladybird CA]

Well they don’t breed true with 1500 colours of seramas

 

[Yard Farmer]

You can get seramas in pure colors, but generally they mix and match colors to what you want.

In your case, there's going to be a lot of recessive, and dominant genetics at work since you're crossing so many (awesome) colors together.

 

[Yard Farmer]

I feel like if Hershey isn't the mother, then it must be Cookie. But it doesn't make much sense that 2 black and white chickens would make a pure white?

Since white and black are the most common dominant genes, I "think" with your seramas, it would just be luck of the draw.

 

[The Birb King]

Since white and black are the most common dominant genes, I "think" with your seramas, it would just be luck of the draw.

I figured out that Cookie and Tiny Tom (both black and white) have pure white offspring. Sadly Cookie isn't alive anymore but I got 2 of her children