The Easter egger? For one, he’s silver/gold split (“golden”), which is how he passed on gold/red to his daughters. He’s also probably incomplete columbian and he might have some duckwing genes in there.
There are two main sex-linked color genes in chickens- gold (aka red/brown/buff/etc) and silver (aka white). Roosters can have two of these genes but hens can only have one. So, a rooster (like your EE) can be gold/silver split, meaning that he has a gold gene and a silver gene. He can then pass on a gold gene or a silver gene to his offspring. However, the silver gene usually covers up the gold gene, so silver/gold split roosters usually look mostly silver (despite the fact that they also have the gold gene) with yellowish leakage and some red on their shoulders.
So, all your EE’s sons are either gold/silver splits (mostly silver with some yellowish/red leakage) or have two silver genes, making them completely silver (like your light brahma hen). The EE’s brown daughters, who can only have one gold or silver gene, didn’t get the silver gene from their silver mother. They got their father’s gold gene, and since they can only have one of those genes, they’re just gold instead of being silver/gold split.
To elaborate on what the other poster told you- there’s a gene called “dominant white”. Red sexlinks do have dominant white from their leghorn parentage. Dominant white is what makes the neck feathers and tail feathers of your red sexlink white. Here’s the thing- dominant white is called “dominant” because it covers almost all black feathering. It turns black feathers into white feathers. So, it’s very likely that your white pullet got the silver gene from her father (which is why she doesn’t show any red coloring) causing her to be silver columbian (the same color as your Brahma). However, with the added dominant white gene from her red sexlink mother, the black feathers that would’ve been on her neck and tail were replaced with white, resulting in an all white bird.
