Bolder line for search term

I am pretty new to Plotly and I want to be able to graph a large set of genes and the number of times they appear in scientific articles. Is there a way for me to have certain genes linked so that when one is searched they all appear (i.e. the synonyms of the gene name)? Is it possible to have the search gene bolder or in a specific color and all the others thinner or a different color?

I am also having some difficulty creating the dropdown menu with all the gene names. Sorry I know that is a lot. Thank you for any assistance!