The tigers' stripe pattern is controlled by the environment. A phenotype is generally the result of genetics and environment.
Phenotypes and environment
A phenotype is any given observable feature of an organism (in this case tigers' stripe pattern).
The phenotype of an organism can be caused by genetic factors (i.e., genes), environmental factors, and/or a combination of both.
In this case, the influence of genetic factors on the phenotype is null, thereby it is caused by the environment.
It is important to note that this phenotype may also be associated with differential gene expression.
Learn more about phenotypes here:
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