Question

two parent butterflies with normal wings have offspring with altered wing shapes what most likely caused this change

Answer 1

The Parents may have had heterozygous genotypes.

Step-by-step explanation:

Normal wings could be the dominant allele that is expressed in the phenotype, and altered wings could be the recessive allele. If both parents had a heterozygous genotype, it is possible for the offspring to have a homzygous recessive genotype.