Question y

Based on the graph seen here, what likely occurred in the new mutant allele? $($Note: copy # of mRNA refers to the number of mRNA transcripts of a particular mRNA$).$

A mutation in the regulatory region increases the affinity of positive transcription factors and RNA polymerase so the gene is transcribed more times

A mutation in the terminator allowed RNA polymerase to continue transcription and caused the mRNA to be longer.

A mutation in the intron prevented splicing and caused the intron to remain in the mRNA making the mRNA longer.

A mutation in the $3^{\text{'}}$ UTR region of the mRNA caused the mRNA to be less stable and translated fewer times