Question

how is allele frequency expressed?
percentage
decimal
ratio

Explanation:

Allele frequency can be represented in multiple ways. A percentage shows the proportion out of 100. A decimal is a proportion out of 1. A ratio compares the number of a particular allele to others. All these are valid ways to express allele frequency.

Answer:

All of the options (percentage, decimal, ratio) are correct ways to express allele frequency.