polyphenism
/ˌpɒlɪˈfiːnɪz(ə)m/Genetics
noun
The capacity of a genotype to produce two or more distinct phenotypes in response to an environmental factor such as temperature, photoperiod, or nutrition. As a count noun: an instance of this; of the any of the phenotypes expressed.
Origin
1960s; earliest use found in Ernst Mayr (1904–2005), evolutionary biologist. From poly- + phen- + -ism.