@daylilly99
Are the two parents registered daylilies or seedlings?
How many other seedlings have bloomed from the cross? How many of those were not yellow?
Surprising results are not necessarily produced by "recessive" effects. Sometimes they are produced by insects pollinating the flower with an unknown pollen as well as the hybridizer pollinating the flower with a known pollen.
I have just come in from counting the number of "bee" pods set on two clumps of a tetraploid daylily. One clump had seven "bee"/natural pollination pods and the other clump had four.
