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I'm a little fascinated with this whole color sexing thing, too.
Your Brown Leghorn sire crossed with a White Leghorn dam may produce sex-linked chicks. It depends on whether that White LH hen is hiding a silver gene as Ella says. Neither a White LH roo nor a Rhode Island Red hen would figure into any sex-link breeding.
If I've got it right, solid-colored sires and "silver" dams produce sex-linked colors in the offspring. The silver may be hidden in a white hen. Or, the silver is not hidden as in a Barred Rock hen - she's showing her silver.
Using hens that are Barred Rock or Silver Laced Wyandotte, or Delawares with a red rooster looks like an easy cross for most backyard chicken-keepers. The rooster can be a RIR, New Hampshire, or a Production Red. The chicks will be cockerels with barring like the dams and the pullets with the solid coloring of the sires.
It was a little surprising to me to learn that "buffs" are the same as "reds." So, the sires can be Buff Orpingtons instead of a RIR, for example.
Even more surprising when I asked on the breeds forum was to learn that "blacks" are solid-colors and fill the requirements for the sires, also! So, the sires can be Black Australorps. A BA sire and a BR dam would produce black chicks without any red (or buff) feathers. However, the cockerels will have barring and the pullets will not.
Things might get a little complicated with variety choices within the same breed but I don't really see why. The Leghorns come in the familiar White (whether hiding silver, or not) and Silver. One of those White (silver) or Silver dams with a Brown, Red, Buff, or Black Leghorn sire should produce offspring with sex-linked colors.
Please understand that I don't really know chicken genetics and I still, still, still don't know how Rhode Island Red sires and Rhode Island White dams produce sex-links! Perhaps there's a "Rhode Island Silver" that I don't know anything about. Maybe the "Rhodebar" that lives in the UK plays a part in this. And, perhaps this is one of those guarded secrets to which Relics refers.
Steve