Identical twins Ilyse and Lauren both have a gene for trait H. The gene for trait H is expressed only when a child eats rice before the age of 2 years. Ilyse and Lauren are separated at birth, and Ilyse lives in Japan, where babies begin eating rice at an early age. Lauren lives in Canada, and she is not given rice before the age of 2 years. Ilyse develops trait H, whereas Lauren does not develop the trait. This is an example of:

Question

Quizplus · Accepted Answer

This is an example of genotype-environment interaction where both twins have the same genotype but different environments lead to different expressions of the trait. The gene for trait H is expressed only when the child eats rice before the age of 2 years, thus the different environments lead to different expressions of the gene in the twins.

Identical Twins Ilyse and Lauren Both Have a Gene for Trait