The sudden change in a gene structure or chromosome number in an organism likely to cause an inheritable change in the phenotype is known as? by Sunday | May 14 | Biology WAEC | 0 comments A. migration B. mutation C. mitosis D. meiosis Correct Answer: Option B B. mutation Users Also Read These:The expression of a gene in the phenotype…When a gene is expressed in the phenotype in a…The process which ensures that the chromosome number…The inheritable characters that are determined by a…Assuming that ‘A’ is gene for normal skin and it is…