Two birds who are identical twins (i. e., have exactly the same genotype), are raised in different zoos. One of them has a red crest as an adult and the other has a yellow crest. What is the most likely conclusion you can draw regarding the heritability of crest color?

Answer: The crest color was determined by the environment

Explanation:

Identical twin birds having the same genotype shows that the genetic material is same in the cells of both. However, the difference in crest color is based on each bird adaptation to its environment

Thus, environment, just as genotype imparts the traits of an organism.