Question

Emma and Anna are identical twins who were adopted by different families a few weeks after their birth. Although genetically identical, they grew up with different physical and psychological characteristics. For example, though both inherited a tendency to grow large, Anna was slim and athletic because of the active lifestyle practiced in her adoptive family. This variability can be explained by how:
a. each zygote is unique.b. longevity genes can make an individual less vulnerable to certain diseases.c. for each genotype, a range of phenotypes can be expressed.d. mutated genes can be a source of genetic variability.

Answer 1

Answer: C. for each phenotype, a range of phenotypes can be expressed

Explanation:

Had this on a test, and my teacher told us it was c.