B. Fossil fuels is putting extra carbon monoxide in the air, affecting plant growth.
Answer:
Hi... Your answer is harmful mutation
The expression of certain genes at different levels may cause color variation in the butterfly wings.
<h3>What is gene expression?</h3>
Gene expression is the cellular process associated with the transcription of certain genes in particular cell types.
In this case, the trait color in butterfly wings is associated with the differential expression of certain genes during development.
The variation in color may be due to the expression of different alleles in butterflies or the same allele at different levels.
Learn more about gene expression here:
brainly.com/question/20682055
The answer is simple dominant
