Pullet or cockerel? White chicken, breed unknown, but most likely a California tan?

[Chicken_Obsesser]

Oh don't worry lol, that happens to me all the time.

 

[DuckDuckPromise]

I have a hen looks like your baby chick there, white feather - picture attached.
The parents are both Isa Brown, so I don't know where the white feather from.

I do not know anything about chicken breed/DNA

Awww, thank you for sharing!
I have NO clue about colors and genes, but it sure is fun learning!

 

[DuckDuckPromise]

Oh don't worry lol, that happens to me all the time.

I felt so bad!!! I tried to change it as fast as I could!

 

[Chicken_Obsesser]

Awww!!!

 

[NatJ]

I felt so bad!!! I tried to change it as fast as I could!

It's not a problem. And you got it changed before I noticed

 

[NatJ]

Oh wow, you are SO much more knowledgeable than I am on this gene stuff! I love reading it though, thank you so so much for sharing with me! Okay, so with that being the case, would it be most likely for one of the California tans to be the biological momma then? They are our ONLY white chickens, and Rooster is the only rooster they have been exposed to, so he is definitely Dad lol.
Everyone in our flock of about 14 is barnyard mix though (except for the 2 California tans)

Yes, it is quite likely that one of the California Tans is the mother.

And you are absolutely right about the gray chicken, we were told from the farm we got the eggs from (our flock EXCEPT for the California tans were all incubated at home) that the eggs would be barnyard mix, but a silkie chicken breed was in the list of possibilities that they could be mixed with, and I think that she (the gray chicken) definitely has some silkie in her! But I am a newbie at the genes stuff, I’m just going by her extra claw, head fluff, and feet feathers!

Yes, she easily could be part Silkie. Those traits are very common in Silkie-mixes and much less common in mixes that do not include Silkie.

 

[SkyAJK]

If you breed an ISA Brown hen with an ISA Brown rooster and hatch a bunch of chicks, I would expect about 1/4 of chicks to be white like the one in your photo.

This happens because of the cross that is used to produce ISA Browns. Some of the genes appear in different combinations in the next generation. One gene determines gold vs. silver (white) in the coloring, and another determines black vs. white in other areas of the chicken. Those two genes cause four different combinations of colors: gold with black or with white, silver with black or with white. Silver with white makes a white chicken like your hen. Silver with black makes a coloring like what Light Brahmas have. Gold with black makes a coloring like what Buff Brahmas have. Gold with white makes the coloring you see in ISA Brown hens.

Thank you. I no longer have the Isa Brown rooster, that was the only Isa brown chick from both Isa brown parents, I would love to hatch more of this chicks. The rest of them might have different colour as you mentioned. Very interesting, Isa brown has nice personality.