A Plant Is Homozygous for a Point Mutation in Gene

question 49

Multiple Choice

A plant is homozygous for a point mutation in gene B.This plant produces wild-type B protein in wild-type amounts,but a more detailed analysis reveals that the B mRNA produced by this plant is two nucleotides shorter than wild type.The mutation is most likely a two base-pair deletion:

• A)downstream of the STOP codon,in the last exon of gene B.
• B)in an intron of gene B away from the splice sites.
• C)in the open reading frame of gene B.
• D)that removed a splice site of gene B.
• E)within the promoter of gene B.