If there are no changes in the birds’ environment and interactions, then there will there be 100% non-singing females from the first generation. It depends on mutations.
Evolution and absence of environmental constraints
The term 'evolution' is used to describe descendence with modification.
Evolution occurs when there are different phenotypes that show differential survival and reproduction (adaptive) fitness.
In absence of evolutionary constraints, phenotypes tend to remain constant and they can be affected by random mutations.
Learn more about evolution here:
https://brainly.com/question/4207376
