Question

a dominant trait is not always the more common trait because sometimes the dominant allele is rare - so it rarely shows up there are many of them and they show up frequently

Explanation:

Dominance refers to the expression of a trait in heterozygous individuals. Frequency of a trait depends on the allele frequencies in a population. A dominant allele can be rare, resulting in the dominant - trait being less common.

Answer:

sometimes the dominant allele is rare - so it rarely shows up