Genetics - readers digest version.
Most genes come in pairs. In basics, a gene can be dominant or recessive. Dominant means it overpowers recessive.
Sometimes totally, sometimes not. Dominant genes are shown in caps. Recessive in lower case. For example:
Black feather color gene is designated as a B, and it is paired. BB = black. Bb = blue. and bb = splash .
Remember, both the hen and the roo each contribute 1 of the genes in the gene pair to offspring.
So if the roo gene pair is B & B (black)
and is bred to a splash hen b Bb Bb
b Bb Bb
The genes contributed pair up so all the offspring are Bb (blue)
Silkied is recessive = ss
Non-silked is Dominant = SS
A split Ss, where the gene pair has one of each is going to show as (dominant) non-silkied but carry the silkied gene hidden.
So if both your roo and hen are "split" for silkied it's going to work out like this:
So if the roo gene pair is S & s (split for silkied)
and is bred to a split for silkied hen S SS Ss
s Ss ss
So it statisticly works out that out of 4 chicks 1 will be non-silkied, 1 will be silkied and 2 will be split for silkied.
Choc/mauve is sex linked which adds in another whole dimension to the thing. Males have a gene pair for chocolate.
Chocolate is recessive (c) not chocolate is dominant (C). So a male can be split for chocolate (Cc) but not show it.
Females tho only have a single gene for chocolate. They can't carry it - they simply are and show it - or aren't.