Thanks to Ilyas for allowing me to post these proofs.
Serendipity Glow is dominant to Soul Whisper
Daenerys a pure Soul Whisper and Oscar Marcus a Serendipity Glow produced a Serendipity Glow. 1st Gyazo
In the second Gyazo you can see the pedigree of Daenerys showing the purity.
Her mother is a Soul Whisper and her father a Genesis Odyssey 2 hiding Soul whisper.
The ages of the grandparents is key here, Destiny Waters was discovered on 7th Sept, 180 days ago, the grandparents box opening predates this so neither could hide Destiny Waters, we can't see the Great Grandparents ages but logic dictates it is likely to be at least 14 days more presuming each cat was the first born and opened on the day it was produced.
Equally Serendipity Stare cannot hide as it was a much more recent discovery. Therefore Daenerys is a pure Soul Whisper meaning Serendipity Glow is dominant to Soul Whisper