How were you able to determine the genotype of Akari and Yunseo, even though you did not test their DNA

Through its physical characteristics.

Explanation:

For finding the genotype of an organism, we have to test DNA of that organisms because all the information about genotype is present in the DNA of that organism. To see the physical characteristics and features, we are able to determine the phenotype of Akari and Yunseo not genotype. So on the basis of physical features and characteristics we can determine Akari and Yunseo.

the correct answer is:

a population changes in response to a change in the environment.

not sure if this is what you'r looking for nnew= nold