Did dinosaurs and humans exist at the same time? What is your evidence?

Cattle with brown fur and cattle with white fur will produce a reddish roan calf . when examined closely, the calf show about an even number of brown hairs and white hairs that give a reddish appearance when viewed from far away. the fact that both the brown fur allele and the white fur allele are expressed equally in the offspring is an example of

Construct at least two possible hypotheses for the student’s experiment.

Plz ! what does it mean for an allele to be dominant?