Mille fleur x porcelain d'uccles

[Nicks_Chicks]

What would happen if I crossed a porcelain d'uccle with a mille fleur d'uccle? I ended up getting a porcelain Cockerel and mill fleur pullet. I originally thought i would just get mille fleurs that are heterozygous for the lavender gene but I then realized lav crossed with anything that's not lav breeds then as if it were black. So idk if that would mess it up at all? @NatJ

 

[Amer]

Mille fleurs. (Carrying the lavender gene.)
Porcelain is mille fleur with the lavender gene.
Lavender is black with the lavender gene. That's why you get black chicks. It's the black base that causes it, not the lavender gene.

 

[NatJ]

What would happen if I crossed a porcelain d'uccle with a mille fleur d'uccle? I ended up getting a porcelain Cockerel and mill fleur pullet.

If the Mille Fleur does not carry lavender, breeding her with the Porcelain male should produce just Mille Fleur chicks, with each chick carrying the lavender gene.

For the pullets from that cross, who have Mille Fleur appearance but carry lavender, you could breed them back to their father the Porcelain male. That should give you about a 50/50 split of Porcelain chicks and Mille Fleur chicks that carry lavender.

If the original Mille Fleur hen does carry lavender, then breeding her to the Porcelain male will produce that 50/50 split of Porcelain chicks and Mille Fleur chicks that carry lavender.

I originally thought i would just get mille fleurs that are heterozygous for the lavender gene but I then realized lav crossed with anything that's not lav breeds then as if it were black. So idk if that would mess it up at all? @NatJ

If you get Mille Fleurs that are heterozygous for the lavender gene, and breed them to each other, you should get about 1/4 Porcelain chicks, 1/2 Mille Fleur chicks that carry lavender, and 1/4 Mille Fleur chicks that do not carry lavender.

The subject gets confusing because "lavender" is the name of a variety (lavender all over) and a gene (present in the varieties Lavender, Porcelain, Isabella, and others.)

The Lavender variety is the one that produces black chicks when crossed with other varieties. A Lavender chicken has the genes to be black all over, with two lavender genes diluting all that black to light gray. A Porcelain chicken has the genes to be a Mille Fleur color, with two lavender genes diluting all the black and gold to gray and cream. So a Lavender (variety) chicken will breed as if it were black, while a Porcelain chicken will breed as if it were Mille Fleur.