Ok, I know that both yellow and orange are mutations of the red gene. But I wanted to know how NR1 (yellow) works with NR2 (orange).

If one parent is NR1 and one is NR2... How does it work?

The reason I'm asking is because my orange dal x mustard gas spawn has a majority of red. There are some orange ones, but the spawn is MOSTLY red (with blue bf).
So does NR1 and NR2 not work together?

:s Confused.

My guess is they need to be homzygous(2 copies), but they only inherited one from each parent (heterozygous). f2 should give you more yellow/ orange. I'm just guessing though.

as far as I know both NR1 and NR2 are single gene recessive traits that do not work together so in your F1 you got mostly reds. This I only know from talking with other breeders. I've haven't worked with NR2 enough to say for sure. In the F2 generation you should recover the NR1 and NR2 colors.


RC

great info on that thanks guys i was kinda wondering why she got what she did as welll :D

The NRs are my passion.
Both are mutations on the red gene, which causes a lessening of color expression, making the fish look yellow or orange.
A fish can carry both 1 and 2.
Because they are different mutations, when you breed them together, they revert back to the original form (red), as it is recessive and needs two copies to express.
So yellow and orange makes red, UNLESS both parents carry both NR genes. And if so, you'll get yellow, orange, and reds.
I hope that made sense, I am dipping towards E